dishdasha vs khalat

dishdasha

noun
  • An ankle-length robe with long sleeves worn by some Arab men. 

khalat

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

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

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