mack vs nark

mack

verb
  • To act as pimp; to pander. 

  • To seduce or flirt with. 

noun
  • An element of a ship's superstructure which places the function of a ship's mast on its exhaust stack, adding the skeletal supporting structure to the smokestack to support the mast's complement of functions. 

  • A raincoat or mackintosh. 

  • An individual skilled in the art of seduction using verbal skills. 

nark

verb
  • To serve or behave as a spy or informer. 

  • To stop. 

  • To annoy or irritate. 

  • 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 mack and nark occurred in a corpus of books? (source: Google Ngram Viewer )