penile vs ribald

penile

adj
  • Pertaining to the penis. 

ribald

adj
  • Coarsely, vulgarly, or lewdly amusing; referring to sexual matters in a rude or irreverent way. 

noun
  • An individual who is filthy or vulgar in nature. 

How often have the words penile and ribald occurred in a corpus of books? (source: Google Ngram Viewer )