breaststrap vs cuirass

breaststrap

noun
  • An oblong application supporting the mammaries of a human female 

  • A piece of horse tack for preventing the saddle from slipping backwards. 

cuirass

noun
  • The breastplate taken by itself. 

  • A piece of defensive armor, covering the body from the neck to the girdle. 

verb
  • To cover with defensive armor; to armor-plate. 

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