bauble vs costume jewellery

bauble

noun
  • A cheap showy ornament piece of jewellery; a gewgaw. 

  • Anything trivial and worthless. 

  • A small shiny spherical decoration, commonly put on Christmas trees. 

  • A club or sceptre carried by a jester. 

costume jewellery

noun
  • Inexpensive jewellery, made of glass and other non-precious materials. 

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