push off vs put off

push off

verb
  • To delay, postpone, put off, push back. 

  • To go away; to get lost. 

  • to commit a foul by pushing against an opponent to both accelerate more quickly and push the opponent in the opposite direction. 

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 

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