Carthusian vs religioner

Carthusian

noun
  • A member of a Christian contemplative order of monks founded by Bruno of Cologne (St Bruno) in 1084. 

  • A pupil of Charterhouse School (founded in a Carthusian monastery) 

adj
  • Of, or relating to this order. 

religioner

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