mufti vs vestment

mufti

noun
  • A civilian dress when worn by a member of the military, or casual dress when worn by a pupil of a school who normally would wear uniform. 

  • A Muslim scholar and interpreter of shari’a law, who can deliver a fatwa. 

vestment

noun
  • A robe, gown, or other article of clothing worn as an indication of office. 

  • Any of the special articles of clothing worn by members of the clergy etc., especially a garment worn at the celebration of the Eucharist. 

  • Clothing. 

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