armband vs bijou

armband

noun
  • An inflatable band worn round the arms to keep afloat in water 

  • A band worn around the arm of the captain of a team. 

  • A band worn around the arm, usually to symbolize protest or mourning. 

bijou

noun
  • A small intricate piece of metalwork. 

  • A jewel. 

  • A piece of jewelry; a trinket. 

adj
  • small, little (often implying affection) 

  • intricate; finely made 

  • small and elegant 

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