platinum vs silver

platinum

adj
  • Of a whitish grey colour, like that of the metal. 

  • Of a musical recording that has sold over one million copies (for singles), or two million (for albums). 

  • Very expensive, or of very high quality 

verb
  • to reach platinum level in a game 

noun
  • A single or album that has achieved platinum sales, i.e. over 1 million or 2 million. 

  • A whitish grey colour, like that of the metal. 

  • A platinum-based drug: a platin. 

  • The chemical element with atomic number 78 and symbol Pt; a dense, malleable, ductile, highly unreactive, silverish-white transition metal of great value. 

silver

adj
  • Having a color like silver: a shiny gray. 

  • Having the clear, musical tone of silver; soft and clear in sound. 

  • Premium, but inferior to gold. 

  • Made from silver. 

  • Denoting the twenty-fifth anniversary, especially of a wedding. 

  • Made from another white metal. 

noun
  • Coins made from silver or any similar white metal. 

  • A lustrous, white, metallic element, atomic number 47, atomic weight 107.87, symbol Ag. 

  • a silver medal 

  • Cutlery and other eating utensils, whether silver or made from some other white metal. 

  • Any items made from silver or any other white metal. 

  • A shiny gray color. 

  • Anything resembling silver; something shiny and white. 

verb
  • To polish like silver; to impart a brightness to, like that of silver. 

  • To acquire a silvery colour. 

  • To cover with silver, or with a silvery metal. 

  • To make hoary, or white, like silver. 

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