rock the boat vs turn against

rock the boat

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

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

turn against

verb
  • To set against or in opposition to something. 

  • To use to the disadvantage or injury of. 

  • To rebel or oppose to something formerly supported. 

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