commiseration vs reassurance

commiseration

noun
  • The act of commiserating; sorrow for the hardships or afflictions of another; pity; compassion. 

reassurance

noun
  • The act of confirming someone's opinion or impression. 

  • Reinsurance. 

  • The feeling of being reassured, of having confidence restored, of having apprehensions dispelled. 

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