Cluniac vs Cluniacensian

Cluniac

noun
  • A monk of the reformed branch of the Benedictine order, founded in 910 at Cluny (or Clugny) in France. 

adj
  • Relating to a reformed Benedictine monastic order founded at Cluny in eastern France. 

Cluniacensian

noun
  • A Cluniac. 

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