put off vs take a rain check

put off

verb
  • To delay (a task, event, etc.). 

  • To procrastinate. 

  • To emit; to give off (an odor, smoke, etc.). 

  • To cause to dislike; to discourage (from doing). 

  • To distract; to disturb the concentration of. 

adj
  • daunted or fazed 

  • offended, repulsed 

take a rain check

verb
  • In social interactions, to request a deferral of an invitation. To "take a rain check" is a polite way to turn down an engagement, usually with the implication that one is simply postponing it and another time might be acceptable. 

  • To request or accept a rain check (an agreement from a merchant to honor a special offer, temporarily unavailable, after the expiration date). 

How often have the words put off and take a rain check occurred in a corpus of books? (source: Google Ngram Viewer )