bijou vs seal ring

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 

seal ring

noun
  • A finger ring with an engraved (often heraldic) seal, fit for sealing documents by pressing it in sealing wax or a similar substance 

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