bauble vs keychain

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. 

keychain

noun
  • An ornamental piece holding such a chain or ring. 

  • A chain or ring to which a key may be attached. 

  • A digital repository for the storage of cryptographic keys. 

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