kaftan vs kimono

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. 

kimono

noun
  • A long robe-like garment in Western fashion, which may be open at the front, loosely inspired by the Japanese garment. 

  • A bathrobe or dressing gown. 

  • A traditional Japanese T-shaped, wrapped-front garment with square sleeves and a rectangular body, now generally worn only on formal occasions. 

  • A yukata. 

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