Man pages matching name encode::mime::encwords in section 3pm:

Encode::MIME::EncWords.3pm.en	debian 10 / libmime-encwords-perl
Encode::MIME::EncWords.3pm.en	debian 11 / libmime-encwords-perl
Encode::MIME::EncWords.3pm.en	debian 12 / libmime-encwords-perl