drive off vs scare off

drive off

verb
  • To force to leave or go away. 

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

scare off

verb
  • To cause (something) to flee by frightening it. 

  • To deter 

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