beat it vs forlet

beat it

verb
  • To leave; to go away. 

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

  • To masturbate, usually a man of himself. 

forlet

verb
  • To abandon; give up; leave; leave behind; forsake; desert; neglect. 

  • To forget. 

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