Caucasian vs ivory

Caucasian

noun
  • A white person. 

  • A group of languages spoken in the Caucasus region. 

  • A native or inhabitant of the Caucasus. 

  • Synonym of White Russian (“a cocktail consisting of coffee liqueur, milk, and vodka”) 

adj
  • Of or relating to the Caucasus region or its culture, languages, and people. 

  • Of a person: having a white complexion and European ancestry; white. 

ivory

noun
  • A white person. 

  • The keys of a piano. 

  • A creamy white color, the color of ivory. 

  • The hard white form of dentin which forms the tusks of elephants, walruses and other animals. 

  • The teeth. 

  • Something made from or resembling ivory. 

  • A die (object bearing numbers, thrown in games of chance). 

adj
  • Resembling or having the colour of ivory. 

  • Made of ivory. 

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