Man pages matching name pkey_free in section 2:

pkey_free.2.en	debian 10 / manpages-dev
pkey_free.2.en	debian 11 / manpages-dev
pkey_free.2.fr	debian 11 / manpages-fr-dev
pkey_free.2.en	debian 12 / manpages-dev
pkey_free.2.fr	debian 12 / manpages-fr-dev
pkey_free.2.ru	debian 12 / manpages-ru-dev