affirmation vs cancellation

affirmation

noun
  • A form of self-forced meditation or repetition; autosuggestion. 

  • That which is affirmed; a declaration that something is true. 

  • The solemn declaration made by Quakers and others incapable of taking an oath. 

cancellation

noun
  • The act, process, or result of cancelling; as, the cancellation of certain words in a contract, or of the contract itself. 

  • In United States intellectual property law, a proceeding in which an interested party seeks to cancel the registration of a trademark or patent. 

  • The operation of striking out common factors, e.g. in both the dividend and divisor. 

  • The property of being cancellate. 

  • A postmark that marks a postage stamp so as to prevent its reuse. 

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