Man pages matching name www::search::null::count in section 3pm:

WWW::Search::Null::Count.3pm.en	debian 10 / libwww-search-perl
WWW::Search::Null::Count.3pm.en	debian 11 / libwww-search-perl
WWW::Search::Null::Count.3pm.en	debian 12 / libwww-search-perl