feeling vs fervor

feeling

noun
  • Emotion; impression. 

  • An opinion, an attitude. 

  • Emotional state or well-being. 

  • Sensation, particularly through the skin. 

  • Emotional attraction or desire. 

  • Intuition. 

adj
  • Emotionally sensitive. 

  • Expressive of great sensibility; attended by, or evincing, sensibility. 

fervor

noun
  • An intense, heated emotion; passion, ardor. 

  • Heat. 

  • A passionate enthusiasm for some cause. 

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