continuant vs fricative

continuant

noun
  • A linguistic sound other than a stop. 

  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

adj
  • Continuing; prolonged; sustained. 

fricative

noun
  • Any of several sounds produced by air flowing through a constriction in the oral cavity and typically producing a sibilant, hissing, or buzzing quality; a fricative consonant. 

adj
  • produced by air flowing through a restriction in the oral cavity. 

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