beat it vs whistle in the wind

beat it

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

  • To leave; to go away. 

  • To masturbate, usually a man of himself. 

whistle in the wind

verb
  • To attempt something that is futile; to say something that is not heeded. 

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