frown on vs put off

frown on

verb
  • To disapprove of (something or someone, often a behavior); to express disapproval of (something or someone). 

put off

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

  • To procrastinate. 

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

  • To distract; to disturb the concentration of. 

  • To delay (a task, event, etc.). 

adj
  • daunted or fazed 

  • offended, repulsed 

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