% This file is embedded in glossaries-extra-manual.pdf 
% Example 123 Entry unit counting (per section) according to category
% Label: "ex:catunitentrycount"
% arara: pdflatex
% arara: pdflatex
% arara: makeglossaries
% arara: pdflatex
% arara: pdfcrop
\documentclass[12pt]{article}
\pagestyle{empty}
\usepackage[colorlinks]{hyperref}
\usepackage{glossaries-extra}
\GlsXtrEnableEntryUnitCounting{abbreviation}{2}{section}
\makeglossaries
% default category=abbreviation:
\newabbreviation{html}{HTML}{hypertext markup language}
\newabbreviation{css}{CSS}{cascading style sheet}
% default category=general:
\newglossaryentry{sample}{name={sample},description={an example}}

\begin{document}
\section{Sample} 

Used once: \gls{html}. 

Used three times: \gls{css} and \gls{css} and \gls{css}. 

Used once: \gls{sample}. 

\section{Another Sample} 

Used once: \gls{css}. 

Used twice: \gls{html} and \gls{html}. 

\printglossaries 
\end{document}