bijou vs breastpin

bijou

noun
  • A piece of jewelry; a trinket. 

  • A jewel. 

  • A small intricate piece of metalwork. 

adj
  • small, little (often implying affection) 

  • intricate; finely made 

  • small and elegant 

breastpin

noun
  • An ornamental pin attached to clothing in a person's upper chest area; a brooch. 

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