falsetto vs soprano

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. 

soprano

verb
  • To sing or utter with high pitch. 

noun
  • Musical part or section higher in pitch than alto and other sections. 

  • Person or instrument that performs the soprano part. 

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