chill vs poker face

chill

noun
  • A lack of warmth and cordiality; unfriendliness. 

  • A moderate, but uncomfortable and penetrating coldness. 

  • A sense of style; trendiness; savoir faire. 

  • An uncomfortable and numbing sense of fear, dread, anxiety, or alarm, often one that is sudden and usually accompanied by a trembling nerve response resembling the body's response to biting cold. 

  • A sudden penetrating sense of cold, especially one that causes a brief trembling nerve response through the body; the trembling response itself; often associated with illness: fevers and chills, or susceptibility to illness. 

  • Calmness; equanimity. 

  • The hardened part of a casting, such as the tread of a carriage wheel. 

  • An iron mould or portion of a mould, serving to cool rapidly, and so to harden, the surface of molten iron brought in contact with it.. 

adj
  • "Cool"; meeting a certain hip standard or garnering the approval of a certain peer group. 

  • Moderately cold or chilly. 

  • Okay, not a problem. 

  • Unwelcoming; not cordial. 

  • Calm, relaxed, easygoing. 

verb
  • To "hang", hang out; to spend time with another person or group. 

  • To lower the temperature of something; to cool. 

  • To become hard by rapid cooling. 

  • To smoke marijuana. 

  • To discourage, depress. 

  • To become cold. 

  • To relax; to lie back. 

  • To harden a metal surface by sudden cooling. 

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 chill and poker face occurred in a corpus of books? (source: Google Ngram Viewer )