khalat vs vestment

khalat

noun
  • A type of native gown worn in parts of Central Asia, historically awarded as a robe of honor. 

  • A long, close-fitting coat with shawl collars and pockets, worn by Ashkenazi Jewish men in Eastern Europe until the early 20th century 

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 khalat and vestment occurred in a corpus of books? (source: Google Ngram Viewer )