coolness vs fervor

coolness

noun

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

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

fervor

noun

  • Heat. 

  • An intense, heated emotion; passion, ardor. 

  • A passionate enthusiasm for some cause. 

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