nickel vs platinum

nickel

noun
  • A silvery elemental metal with an atomic number of 28 and symbol Ni. 

  • Interstate 5, a highway that runs along the west coast of the United States. 

  • Five hundred dollars. 

  • A playing card with the rank of five 

  • A defensive formation with five defensive backs, one of whom is a nickelback, instead of the more common four. 

  • Five dollars. 

  • A five-year prison sentence. 

  • An airborne propaganda leaflet. 

  • A coin worth 5 cents. 

verb
  • To distribute airborne leaflet propaganda. 

  • To plate with nickel. 

platinum

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

  • 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. 

adj
  • 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 

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

verb
  • to reach platinum level in a game 

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