deep six vs dumpsite

deep six

noun
  • The grave or death; also, the (notional) place where something is discarded. 

  • Ejection, discardment or destruction. 

verb
  • To discard, get rid of, or cancel; to completely put an end to something. 

dumpsite

noun
  • A dump for garbage, usually a dump that is actively in use; or the location of such a dump 

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