placate vs please

placate

verb
  • To calm; to bring peace to; to influence someone who was furious to the point that they become content or at least no longer irate. 

please

verb
  • To make happy or satisfy; to give pleasure to. 

  • To desire; to will; to be pleased by. 

adv
  • An expression of annoyance or impatience. 

  • Said as a request to repeat information. 

  • Used to make a polite request. 

  • Used as an affirmative to an offer. 

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