contentment vs mordancy

contentment

noun
  • happiness in one's situation; satisfaction 

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

  • The state or degree of being contented or satisfied. 

mordancy

noun
  • The state or quality of being mordant. 

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