friar vs holy man

friar

noun
  • A member of a mendicant Christian order such as the Augustinians, Carmelites (white friars), Franciscans (grey friars) or the Dominicans (black friars). 

  • An American fish, the silverside. 

holy man

noun
  • A man who has devoted himself to religious practice, especially one who has absented himself from society to follow his religion; an ascetic or saint. 

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