momentane vs momentary

momentane

noun
  • In Finnish and Navajo, a verb aspect indicating that an occurrence is sudden and short-lived. 

momentary

adj
  • Lasting for only a moment. 

  • Ephemeral or relatively short-lived. 

  • Happening at every moment; perpetual. 

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