denounce vs falsetto

denounce

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

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

  • 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. 

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

falsetto

verb
  • To sing or utter in falsetto. 

noun
  • A person who sings in falsetto. 

  • The "false" (singing) voice in any human, usually airy and lacking a purity of vowels; created by utilizing the next highest vocal folds above those used for speech and normal range singing. It is commonly confused with the head voice register. 

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