Caucasian vs peckerwood

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. 

peckerwood

noun
  • A white person, especially a Southerner, or one who is ignorant, rustic, or bigoted. 

  • A woodpecker. 

  • A white (male) inmate, especially one who is racist or who is a member of a race-based prison gang. 

  • A peckerwood sawmill. 

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