brooch vs jewellery

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. 

jewellery

noun
  • Collectively, personal ornamentation such as rings, necklaces, brooches and bracelets, made of precious metals and sometimes set with gemstones. 

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