breastplate vs skull

breastplate

noun
  • A piece of armor that covers the chest. 

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

  • 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. 

skull

noun
  • The crown of the headpiece in armour. 

  • A crust formed on the ladle, etc. by the partial cooling of molten metal. 

  • The mind or brain. 

  • A shallow bow-handled basket. 

  • The main bones of the head considered as a unit; including the cranium, facial bones, and mandible. 

  • These bones as a symbol for death; death's-head. 

verb
  • To strike the top of (the ball). 

  • To hit in the head with a fist, a weapon, or a thrown object. 

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