CC vs crowd control

CC

noun
  • companion of the Order of Canada 

crowd control

noun
  • The concept or collective of action-impairing debuffs. 

  • The supervision and control of a crowd of people, to keep the crowd orderly. 

verb
  • To apply such a debuff. 

How often have the words CC and crowd control occurred in a corpus of books? (source: Google Ngram Viewer )