Dervish vs puritan

Dervish

noun
  • A member of a Sufi Muslim ascetic fraternity of mendicant friars. 

  • A citizen or inhabitant of Darawiish (circa 1895–1920 C.E.), the Dhulbahante anti-colonial polity geographically corresponding with Khaatumo. 

puritan

noun
  • A puritanical person. 

adj
  • Acting or behaving according to the Puritan morals (e.g. propagating modesty), especially with regard to pleasure, nudity and sex. 

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