pump out vs wear down

pump out

verb
  • to remove liquid using a pump 

  • to produce in large quantities 

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 pump out and wear down occurred in a corpus of books? (source: Google Ngram Viewer )