acting vs playing

acting

noun
  • Something done by a party — so called to avoid confusion with the legal senses of deed and action. 

  • Pretending. 

  • The occupation of an actor. 

adj
  • Temporarily assuming the duties or authority of another person when they are unable to do their job. 

playing

noun
  • An occasion on which something, such as a song or show, is played. 

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