breastplate vs chest wall

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. 

chest wall

noun
  • The set of tissues that bound the thoracic cavity, including the rib cage, fascia, muscles etc. 

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