beat it vs flee

beat it

verb
  • To leave; to go away. 

  • Used other than figuratively or idiomatically: see beat, it. 

  • To masturbate, usually a man of himself. 

flee

verb
  • To run away; to escape. 

  • To escape from. 

  • To disappear quickly; to vanish. 

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