Carthusian vs marabout

Carthusian

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

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

adj
  • Of, or relating to this order. 

marabout

noun
  • The tomb or shrine of such a person. 

  • A Muslim holy man or mystic, especially in parts of North Africa. 

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