bric-a-brac vs flotsam and jetsam

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. 

flotsam and jetsam

noun
  • A collection of miscellaneous items or fragments of little importance. 

  • That which has been discharged from a ship or boat, especially on the ocean or a sea, (flotsam unintentionally and jetsam intentionally). 

  • The remains of a shipwreck still floating in the water. 

  • People considered to be of little worth. 

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