appetite vs contentment

appetite

noun
  • The desire for some personal gratification, either of the body or of the mind. 

  • Desire to eat food or consume drink. 

  • Any strong desire; an eagerness or longing. 

contentment

noun
  • The neurophysiological experience of satisfaction and being at ease in one's situation, body, and/or mind. 

  • happiness in one's situation; satisfaction 

  • The state or degree of being contented or satisfied. 

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