djellaba vs nightgown

djellaba

noun
  • A loose-fitting, ankle-length hooded robe worn by men in North Africa. 

nightgown

noun
  • A long loose robe worn mainly by women for sleeping in. 

  • A dressing gown. 

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