denounce vs sanction

denounce

verb
  • To announce the termination of; especially a treaty or armistice. 

  • To claim the right of working a mine that is abandoned or insufficiently worked. 

  • To make a formal or public accusation against; to inform against; to accuse. 

  • To criticize or speak out against (someone or something); to point out as deserving of reprehension, etc.; to openly accuse or condemn in a threatening manner; to invoke censure upon; to stigmatize; to blame. 

sanction

verb
  • To give official authorization or approval to; to countenance. 

  • To penalize (a state etc.) with sanctions. 

  • To ratify; to make valid. 

noun
  • An approval, by an authority, generally one that makes something valid. 

  • A penalty, punishment, or some coercive measure, intended to ensure compliance; especially one adopted by several nations, or by an international body. 

  • A law, treaty, or contract, or a clause within a law, treaty, or contract, specifying any of the above. 

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