Fescennine vs risqué

Fescennine

adj
  • Of or pertaining to the ancient Etruscan town of Fescennia 

  • obscene or scurrilous 

risqué

adj
  • Suggestive of sexual impropriety; bordering on the indelicate. 

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