coolness vs sangfroid

coolness

noun
  • Indifference; lack of passion or interest. 

  • The state of being cool, i.e. calm. 

  • The state of being cool, i.e. good or pleasing. 

  • The result or product of being cool, i.e. good or pleasing. 

  • The state of being cool, i.e. chilly. 

  • The result or product of being cool, i.e. chilly. 

sangfroid

noun
  • Composure, self-possession or imperturbability especially when in a dangerous situation. 

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