ardor vs discouragement

ardor

noun
  • Intense heat. 

  • Great warmth of feeling; fervor; passion. 

  • Spirit; enthusiasm; passion. 

discouragement

noun
  • Anything that discourages. 

  • The act of discouraging. 

  • The loss of confidence or enthusiasm. 

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