breastplate vs suit of armour

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. 

suit of armour

noun
  • A collection of garments, usually made of metal, worn over the body for protection in battle from weapons. 

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