nonchalance vs suffering

nonchalance

noun
  • Indifference, unconcern; carelessness; coolness; disregard, detachment. 

suffering

adj
  • Experiencing pain; characterized by suffering. 

noun
  • The condition of someone who suffers; a state of pain or distress. 

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