poker face vs puss

poker face

noun
  • Any similar expression used to prevent giving away one's motives, feelings, or situation. 

  • An impassive facial expression cultivated to prevent other players from determining whether one's actions in the game are the result of a quality hand, or of bluffing. 

puss

noun
  • A coward; a wuss; someone who is unable to stand up for themself. 

  • The face. 

  • A cat. 

  • The vulva (female genitalia). 

  • Sex with a woman. 

  • The mouth. 

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