fervor vs irreverence

fervor

noun
  • A passionate enthusiasm for some cause. 

  • Heat. 

  • An intense, heated emotion; passion, ardor. 

irreverence

noun
  • The state or quality of being irreverent; want of proper reverence; disregard of the authority and character of a superior. 

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