Dervish vs fakir

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. 

fakir

noun
  • An ascetic mendicant, especially one who performs feats of endurance or apparent magic. 

  • Someone who takes advantage of the gullible through fakery, especially of a spiritual or religious nature. 

  • A faqir, owning no personal property and usually living solely off alms. 

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