continuant vs recurring

continuant

adj
  • Continuing; prolonged; sustained. 

noun
  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

  • A linguistic sound other than a stop. 

recurring

adj
  • Happening or occurring frequently, with repetition. 

  • Of a decimal: having a set of digits that is repeated indefinitely. 

noun
  • A recurrence; a coming round again. 

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