drive away vs drive off

drive away

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

  • To force someone or something to leave 

drive off

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

  • To force to leave or go away. 

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