beat off vs drive away

beat off

verb
  • To drive something away with blows or military force. 

  • To waste time. 

  • To masturbate, usually a man of himself. 

drive away

verb
  • To force someone or something to leave 

  • Used other than figuratively or idiomatically: see drive, away. 

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