call it quits vs knock it off

call it quits

verb
  • To conclude; to quit or stop an activity, especially after applying oneself to it for a significant period of time. 

  • To declare debts resolved to one another 

knock it off

verb
  • To cease doing something, particulary annoying or unpleasant; to desist. 

intj
  • Cease doing something, particularly annoying or unpleasant; desist. 

How often have the words call it quits and knock it off occurred in a corpus of books? (source: Google Ngram Viewer )