armband vs brooch

armband

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

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

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

brooch

noun
  • A piece of ornamental jewellery having a pin allowing it to be fixed to garments worn on the upper body. 

  • A painting all of one colour, such as a sepia painting. 

verb
  • To adorn as with a brooch. 

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