Man pages matching name pthreads in section 7:

pthreads.7.en	debian 10 / manpages
pthreads.7.ja	debian 10 / manpages-ja
pthreads.7.en	debian 11 / manpages
pthreads.7.fr	debian 11 / manpages-fr
pthreads.7.ja	debian 11 / manpages-ja
pthreads.7.en	debian 12 / manpages
pthreads.7.fr	debian 12 / manpages-fr
pthreads.7.ja	debian 12 / manpages-ja
pthreads.7.ru	debian 12 / manpages-ru