appetite vs yearning

appetite

noun
  • Any strong desire; an eagerness or longing. 

  • Desire to eat food or consume drink. 

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

yearning

noun
  • A wistful or melancholy longing. 

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