condolence vs condolences

condolence

noun

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

  • Comfort, support or sympathy. 

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. 

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