enamel vs nickel

enamel

noun
  • An opaque, glassy coating baked onto metal or ceramic objects. 

  • The hard covering on the exposed part of a tooth. 

  • A coating that dries to a hard, glossy finish. 

  • A cosmetic intended to give the appearance of a smooth and beautiful complexion. 

verb
  • To form a glossy surface like enamel upon. 

  • To variegate with colours, as if with enamel. 

  • To coat or decorate with enamel. 

  • To disguise with cosmetics, as a woman's complexion. 

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. 

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