dismay vs rock the boat

dismay

verb
  • To take dismay or fright; to be filled with dismay. 

  • To render lifeless; to subdue; to disquiet. 

  • To cause to feel apprehension; great sadness, or fear; to deprive of energy 

noun
  • A sudden or complete loss of courage and firmness in the face of trouble or danger; overwhelming and disabling terror; a sinking of the spirits 

  • Condition fitted to dismay; ruin. 

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. 

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