discard vs three of a kind

discard

noun
  • A discarded playing card in a card game. 

  • A temporary variable used to receive a value of no importance and unable to be read later. 

  • Anything discarded. 

verb
  • To throw away, to reject. 

  • To make a discard; to throw out a card. 

  • To dismiss from employment, confidence, or favour; to discharge. 

three of a kind

noun
  • A hand including three cards of the same rank. 

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