flotsam vs raff

flotsam

noun
  • Debris floating in a river or sea, in particular fragments from a shipwreck. 

raff

noun
  • A promiscuous heap; a jumble; a large quantity; lumber; refuse. 

  • A low fellow; a churl. 

  • A three-cornered sail set on a schooner when before the wind. 

  • The common rabble or mob; riffraff. 

verb
  • To sweep, snatch, draw, or huddle together; to take by a promiscuous sweep. 

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