tire out vs wear down

tire out

verb
  • To make someone tired; to exhaust. 

wear down

verb
  • To cause (someone) physical or mental fatigue. 

  • To eventually persuade or defeat (someone) through persistent effort. 

  • Used other than figuratively or idiomatically: see wear, down. 

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