caterwaul vs falsetto

caterwaul

verb
  • To cry as cats in heat; to make a harsh, offensive noise. 

  • To have a noisy argument, like cats. 

noun
  • A yowling. 

  • A noisy quarrel. 

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 caterwaul and falsetto occurred in a corpus of books? (source: Google Ngram Viewer )