balaclava vs headscarf

balaclava

noun
  • A type of warm headgear covering the neck, head, and often part of the face, with apertures left as necessary, often made out of wool. 

  • A ski mask with holes for the eyes and, sometimes, the nose and mouth, which may be rolled up and worn like a toque or pulled over the face for greater protection. 

headscarf

noun
  • A more or less square piece of material worn over the head, typically by women, often to protect the hair, or for religious reasons. 

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