rock the boat vs turn on

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 on

verb
  • To depend upon; to pivot around, to have as a central subject. 

  • To aim at. 

  • To power up, to put into operation, to start, to activate (an appliance, light, mechanism, functionality etc.). 

  • To fill with enthusiasm; to intoxicate, give pleasure to ( + to an object of interest or excitement). 

  • To start operating; to power up, to become on. 

  • To take drugs. 

  • To cause to take up drugs, especially hallucinogens. 

  • To set a flow of fluid or gas running by rotating a tap or valve. 

  • To violently rebel against; to suddenly attack. 

  • To sexually arouse. 

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