drive out vs retain

drive out

verb
  • to push or to pull, i.e. to force, (someone or something) out of somewhere 

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

retain

verb
  • To employ by paying a retainer. 

  • To hold back (a pupil) instead of allowing them to advance to the next class or year. 

  • To keep in one's pay or service. 

  • To keep in possession or use. 

  • To hold secure. 

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