hijab vs muffler

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. 

muffler

noun
  • A type of scarf. 

  • Part of the exhaust pipe of a car that dampens the noise the engine produces. 

  • A silencer or suppressor fitted to a gun. 

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