mahant vs parson

mahant

noun
  • A head or chief of a monastery 

parson

noun
  • An Anglican cleric having full legal control of a parish under ecclesiastical law; a rector. 

  • A Protestant minister. 

  • A Roman Catholic priest of an independent parish church. 

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