dross vs recycle bin

dross

noun
  • A waste product from working with metal. 

  • Worthless or trivial matter. 

  • The impurities in metal. 

  • Waste or impure matter. 

  • Residue that forms on the surface of molten metal from oxidation. 

verb
  • To remove dross from. 

recycle bin

noun
  • A container in which items to be recycled may be placed. 

  • In Microsoft Windows, a storage location for deleted files, from which they can be retrieved or permanently deleted. 

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