dishabille vs kaftan

dishabille

noun
  • A loose, negligent dress. 

  • Extreme casual or disorderly dress, for example, with the shirt-tail out, sleeves unbuttoned, etc. 

kaftan

noun
  • A long dress or shirt similar in style to those worn in the Eastern Mediterranean. 

  • A long tunic worn in the Eastern Mediterranean. 

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