ferraiolo vs kaftan

ferraiolo

noun
  • A kind of cape worn by Catholic clergy over the shoulders, extending down to the ankles and tied in the front. 

kaftan

noun
  • A long tunic worn in the Eastern Mediterranean. 

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

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