Sufi vs gymnosophist

Sufi

noun
  • A mystic Muslim; a Muslim ascetic; a practitioner of Sufism. 

gymnosophist

noun
  • One of a school of ancient Indian ascetic philosophers, reported in antiquity, who wore little clothing; a mystic. 

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