grappa vs whiskey

grappa

noun
  • A variety or serving of grappa. 

  • An Italian grape-based spirit of between 80 and 100 proof, made from the distillation of pomace. 

whiskey

noun
  • A light gig or carriage; a tim-whiskey. 

  • A drink of whiskey. 

  • A liquor distilled from the fermented mash of grain (as rye, corn, or barley). 

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