headgear vs hijab

headgear

noun
  • Anything worn on the head, such as a hat, hood, helmet, etc. 

  • A type of orthodontic appliance attached to dental braces that aids in correcting severe bite problems. 

  • The harness that fits on a horse's head. 

  • The lifting gear at the head of a mine or deep well. 

  • The rigging on the foresail. 

hijab

noun
  • A traditional headscarf worn by Muslim women, covering the hair and neck. 

  • The practice, among Muslim women, of covering the body after the age of puberty in front of non-related adult males. 

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