colt's tooth vs lust

colt's tooth

noun
  • Youthful desires, especially lust. 

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

lust

noun
  • A feeling of strong desire, especially such a feeling driven by sexual arousal. 

verb
  • To look at or watch with a strong desire, especially of a sexual nature. 

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