colt's tooth vs libidinosity

colt's tooth

noun
  • Youthful desires, especially lust. 

  • One of a horse's first set of teeth. 

libidinosity

noun
  • Lustful desires, characterized by lewdness; sensuality; lascivity. 

How often have the words colt's tooth and libidinosity occurred in a corpus of books? (source: Google Ngram Viewer )