khalat vs lab coat

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. 

lab coat

noun
  • A white coat worn by laboratory workers to protect day clothes from damage by spillage etc. 

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