bric-a-brac vs costume jewellery

bric-a-brac

noun
  • Small ornaments and other miscellaneous display items of little value. 

  • Any collection containing a variety of miscellaneous items; a hodgepodge, an olio. 

costume jewellery

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

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