Man pages matching name email::mime::contenttype in section 3pm:

Email::MIME::ContentType.3pm.en	debian 10 / libemail-mime-contenttype-perl
Email::MIME::ContentType.3pm.en	debian 11 / libemail-mime-contenttype-perl
Email::MIME::ContentType.3pm.en	debian 12 / libemail-mime-contenttype-perl