icy vs poker face

icy

adj
  • To be wearing an excessive amount of jewelry, especially of the high-quality and expensive kind. 

  • Characterized by coldness of manner; frigid; cold. 

  • Covered with ice, wholly or partially. 

  • Pertaining to, resembling, or abounding in ice; cold; frosty. 

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. 

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