Carthusian vs friar

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. 

friar

noun
  • A member of a mendicant Christian order such as the Augustinians, Carmelites (white friars), Franciscans (grey friars) or the Dominicans (black friars). 

  • An American fish, the silverside. 

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