continuant vs haunting

continuant

adj
  • Continuing; prolonged; sustained. 

noun
  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

  • A linguistic sound other than a stop. 

haunting

adj
  • Remaining in the mind; not easily forgotten. 

noun
  • A particular instance of haunting; a ghostly habitation. 

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