continuant vs undeviating

continuant

adj
  • Continuing; prolonged; sustained. 

noun
  • An endurant. 

  • A determinant formed from a tridiagonal matrix. 

  • A linguistic sound other than a stop. 

undeviating

adj
  • That does not change; steady. 

  • That does not deviate, veer or turn aside; unswerving. 

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