brooch vs watchband

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. 

watchband

noun
  • a band of leather, metal etc that fastens a wristwatch to the wrist; a watchstrap 

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