continuative vs momentary

continuative

adj
  • Of or pertaining to continuation. 

  • durative. 

noun
  • a durative. 

  • Something that causes a continuation. 

momentary

adj
  • Happening at every moment; perpetual. 

  • Lasting for only a moment. 

  • Ephemeral or relatively short-lived. 

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