please vs rock the boat

please

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. 

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

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

rock the boat

verb
  • I'd just jump in and fix it, but that's not my job, and I don't want to rock the boat. 

  • To disturb the status quo or go against rules or conventions, as in an effort to get attention. 

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