continuant vs hissing

continuant

noun

  • A linguistic sound other than a stop. 

  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

adj

  • Continuing; prolonged; sustained. 

hissing

noun

  • The sound of a hiss. 

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