condolences vs self-denial

condolences

noun
  • comfort, support, or sympathy offered especially to the family and friends of somebody who has died. 

intj
  • Expressing sympathy to someone, especially after learning of a close death. 

self-denial

noun
  • Action that sacrifices one's own benefit for the good of others. 

How often have the words condolences and self-denial occurred in a corpus of books? (source: Google Ngram Viewer )