condolences vs estimation

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. 

estimation

noun
  • Esteem or favourable regard. 

  • The process of making an estimate. 

  • The amount, extent, position, size, or value reached in an estimate. 

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