hearten vs put off

hearten

verb
  • To give heart to; to encourage, urge on, cheer, give confidence to. 

put off

adj
  • daunted or fazed 

  • offended, repulsed 

verb
  • 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. 

  • To delay (a task, event, etc.). 

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