colt's tooth vs lech

colt's tooth

noun

  • Youthful desires, especially lust. 

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

lech

noun

  • A strong, lecherous desire or craving. 

  • A lecher. 

  • The capstone of a cromlech. 

verb

  • To behave lecherously. 

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