marabout vs rishi

marabout

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

  • The tomb or shrine of such a person. 

rishi

noun
  • A Vedic poet and seer who composed Rigvedic hymns, who alone or with others invokes the deities with poetry of a sacred character. 

  • A Hindu sage or saint occupying the same position in India history as the patriarchs of other countries, constituting a peculiar class of beings in the early mythical system, as distinct from Asuras, Devas and mortal men. 

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