cackle vs falsetto

cackle

verb
  • To talk in a silly manner; to prattle. 

  • To laugh with a broken sound similar to a hen's cry. 

  • To pretend to rattle (dice) in one's hand while gripping them so that they maintain their orientation. 

  • To make a sharp, broken noise or cry, as a hen or goose does. 

noun
  • The cry of a hen or goose, especially when laying an egg. 

  • Futile or excessively noisy talk. 

  • A group of hyenas. 

  • A laugh resembling the cry of a hen or goose. 

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