breaststrap vs strophium

breaststrap

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

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

strophium

noun
  • A band worn around the breasts, serving as a form of bra. 

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