cease and desist vs nark

cease and desist

verb
  • To stop and not resume an action. 

noun
  • A demand that one stop and not resume continuing a certain behavior, such as copyright infringement, trademark infringement, slander, or libel. 

nark

verb
  • To stop. 

  • To annoy or irritate. 

  • To serve or behave as a spy or informer. 

  • To complain. 

  • To watch; to observe. 

noun
  • An unpleasant person, especially one who makes things difficult for others. 

  • A police spy or informer. 

How often have the words cease and desist and nark occurred in a corpus of books? (source: Google Ngram Viewer )