Man pages matching name validation::class::directive::ssn in section 3pm:

Validation::Class::Directive::SSN.3pm.en	debian 10 / libvalidation-class-perl
Validation::Class::Directive::SSN.3pm.en	debian 11 / libvalidation-class-perl
Validation::Class::Directive::SSN.3pm.en	debian 12 / libvalidation-class-perl