falsetto vs grunt

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. 

grunt

verb
  • To make a grunt or grunts. 

  • To break wind; to fart. 

noun
  • A short snorting sound, often to show disapproval, or used as a reply when one is reluctant to speak. 

  • An infantry soldier. 

  • A dessert of steamed berries and dough, usually blueberries; blueberry grunt. 

  • Any fish of the perciform family Haemulidae. 

  • A person who does ordinary and boring work. 

  • The amount of power of which a vehicle is capable. 

  • The snorting cry of a pig. 

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