drive away vs fend off

drive away

verb
  • To force someone or something to leave 

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

fend off

verb
  • To defend against; to repel with force or effort 

  • To prevent (a vessel) from running against anything with too much violence. 

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