Dervish vs celibate

Dervish

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

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

celibate

noun
  • One who is not married, especially one who has taken a religious vow not to get married, usually because of being a member of a religious community. 

verb
  • To practice celibacy 

adj
  • Not married. 

  • Abstaining from sexual relations and pleasures. 

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