breastplate vs headgear

breastplate

noun
  • A piece of horse tack designed to prevent the saddle slipping backwards. 

  • A piece of armor that covers the chest. 

  • A piece of silicone in the shape of women's breasts worn by drag queens and other female impersonators to simulate a female body shape. 

  • An embroidered square of linen worn on the breast of the Jewish high priest, bearing twelve precious stones, each inscribed with the name of one of the tribes of Israel. 

headgear

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

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

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

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

  • The rigging on the foresail. 

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