Caucasian vs white bread

Caucasian

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

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

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”) 

white bread

adj
  • Of or relating to white people. 

  • Bland, boring; flavorless. 

noun
  • Bread made from white flour. 

  • A white person, a person of European descent, a person who 'acts white'. 

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