the bee's knees vs the shit

the bee's knees

noun
  • Something or someone excellent, surpassingly wonderful, or cool. 

  • Used other than figuratively or idiomatically: see bee, -'s, knee. Corbiculae. 

the shit

noun
  • Something considered to be excellent or the best of its kind. 

How often have the words the bee's knees and the shit occurred in a corpus of books? (source: Google Ngram Viewer )