Man pages matching name sigvec in section 3:

sigvec.3.en	debian 10 / manpages-dev
sigvec.3.ja	debian 10 / manpages-ja-dev
sigvec.3.en	debian 11 / manpages-dev
sigvec.3.fr	debian 11 / manpages-fr-dev
sigvec.3.ja	debian 11 / manpages-ja-dev
sigvec.3.en	debian 12 / manpages-dev
sigvec.3.fr	debian 12 / manpages-fr-dev
sigvec.3.ja	debian 12 / manpages-ja-dev
sigvec.3.ru	debian 12 / manpages-ru-dev