How to use a dot to separate my new bibliography entry?

Question

Based on the questions:

1. How to show Not cited and Cited i times on pages ..., in the bibliography when using biblatex?,
2. How to detect whether \PassOptionsToPackage was already called?
3. How to detect whether the option citecounter was enabled on biblatex?

I build the following example:

But I would like for it to use a dot to separate my new cited entry, instead of using a comma. For example, instead of:

Visited on: 17 Feb. 2018, cited one time on page 1.

I would like to see: ......\/..... (dot here, not comma)

Visited on: 17 Feb. 2018. Cited one time on page 1.

\RequirePackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@mvbook{assis08,
    author = {Machado de Assis},
    title = {Obra completa em quatro volumes},
    year = {2008},
    editor = {Aluizio Leite and Ana Lima Cecilio and Heloisa Jahn},
    editortype = {organizer},
    edition = {2},
    volumes = {4},
    publisher = {Nova Fronteira},
    location = {Rio de Janeiro},
    series = {Biblioteca luso-brasileira. Série brasileira brasileira brasiled},
    urlaccessdate = {2018-02-17},
}

@book{koma-scrguien,
    author = {Markus Kohm},
    edition = {2017-04-13},
    howpublished = {\url{http://mirrors.ibiblio.org/CTAN/.../scrguien.pdf}},
    publisher = {Online Material; \url{https://www.ctan.org/pkg/koma-script}},
    title = {The Guide KOMA -Script},
    urlaccessdate = {2017-08-28},
    year = {2017},
}
\end{filecontents*}
\PassOptionsToPackage{brazil,main=english,spanish,french}{babel}

\documentclass[12pt,a4paper,english]{abntex2}
\usepackage[utf8]{inputenc}
\usepackage{csquotes}
\selectlanguage{english}

\usepackage[
style=abnt,repeatfields=true,backend=biber,backref=true,citecounter=true]{biblatex}
\pdfstringdefDisableCommands{\let\uppercase\relax}
\addbibresource{\jobname.bib}

\makeatletter
  \newcommand{\biblatexcitedntimes}{\autocap{c}ited \arabic{citecounter} times}
  \newcommand{\biblatexcitedonetime}{\autocap{c}ited one time}
  \newcommand{\biblatexcitednotimes}{\autocap{n}o citation in the text}

  \@ifpackageloaded{babel}{\@ifpackagewith{babel}{brazil}{\addto\captionsbrazil{%
    \renewcommand{\biblatexcitedntimes}{\autocap{c}itado \arabic{citecounter} vezes}
    \renewcommand{\biblatexcitedonetime}{\autocap{c}itado uma vez}
    \renewcommand{\biblatexcitednotimes}{\autocap{n}enhuma citação no texto}
  }}{}}{}
\makeatother

\ifx\blx@citecounter\relax
  \message{Is citecounter defined? NO!^^J}
\else
  \message{Is citecounter defined? YES!^^J}
  \ifbacktracker
    \message{Is backtracker defined? YES!^^J}
    \renewbibmacro*{pageref}
    {
      \iflistundef{pageref}
      {\printtext{\biblatexcitednotimes}}
      {%
        \printtext
        {%
          \ifnumgreater{\value{citecounter}}{1}
            {\biblatexcitedntimes}
            {\biblatexcitedonetime}
        }%
        \setunit{\addspace}%
        \ifnumgreater{\value{pageref}}{1}
          {\bibstring{backrefpages}\ppspace}
          {\bibstring{backrefpage}\ppspace}%
        \printlist[pageref][-\value{listtotal}]{pageref}%
      }%
    }

    \DefineBibliographyStrings{brazil}
    {
      backrefpage  = {na página},
      backrefpages = {nas páginas},
    }

    \DefineBibliographyStrings{english}
    {
      backrefpage  = {on page},
      backrefpages = {on pages},
    }
  \else
    \message{Is backtracker defined? NO!^^J}
  \fi
\fi

\begin{document}
Citing \cite{assis08}.

Citing \cite{koma-scrguien}.

\printbibliography
\end{document}

Related questions:

1. biblatex \newblock and \finentry don't insert specified punctuation
2. biblatex: move backrefpages to after the period
3. Guidelines for customizing biblatex styles
4. Remove finentrypunct if multicitedelim is in place
5. How to remove the full stop at the end of each bibliography entry?

Answer 1

If I run your MWE on my fully updated MikTeX machine this morning I get a full stop before the pageref info as you hoped. According to \listfiles my biblatex-abnt is at version 3.4

abnt.bbx    2018-11-17 v3.4 ABNT BibLaTeX citation style

Usually (in the standard styles for example) the punctuation before pageref is controlled by \bibpagerefpunct. So if you wanted to change the punctuation you would just say

\renewcommand*{\bibpagerefpunct}{\addcomma\space}

This worked in older versions of biblatex-abnt and will work again in future versions with https://github.com/abntex/biblatex-abnt/pull/55.

The current release version 3.4 of biblatex-abnt uses \setunit*{\bibpagerefpunct} where \setunit{\bibpagerefpunct} would be more appropriate and therefore usually drops this punctuation in favour of the standard \newunitpunct.

As a temporary measure you could include the \setunit{\bibpagerefpunct} directly in your pageref redefinition (I usually don't recommend this, but since biblatex-abnt does it at the moment and it seems the shortest workaround, you should be fine).

\ifx\blx@citecounter\relax
  \message{Is citecounter defined? NO!^^J}
\else
  \message{Is citecounter defined? YES!^^J}
  \ifbacktracker
    \message{Is backtracker defined? YES!^^J}
    \renewbibmacro*{pageref}
    {\printunit{\bibpagerefpunct}% I'd have preferred \setunit,
                                 % but \printunit covers more edge cases
      \iflistundef{pageref}
      {\printtext{\biblatexcitednotimes}}
      {%
        \printtext
        {%
          \ifnumgreater{\value{citecounter}}{1}
            {\biblatexcitedntimes}
            {\biblatexcitedonetime}%
        }%
        \setunit{\addspace}%
        \ifnumgreater{\value{pageref}}{1}
          {\bibstring{backrefpages}\ppspace}
          {\bibstring{backrefpage}\ppspace}%
        \printlist[pageref][-\value{listtotal}]{pageref}%
      }%
    }

    \DefineBibliographyStrings{brazil}
    {
      backrefpage  = {na página},
      backrefpages = {nas páginas},
    }

    \DefineBibliographyStrings{english}
    {
      backrefpage  = {on page},
      backrefpages = {on pages},
    }
  \else
    \message{Is backtracker defined? NO!^^J}
  \fi
\fi

With this code \bibpagerefpunct should work as expected.