brandy vs cognac

brandy

noun
  • An alcoholic liquor distilled from wine or fermented fruit juice. 

  • A glass of brandy. 

  • Any variety of brandy. 

verb
  • To preserve, flavour, or mix with brandy. 

cognac

noun
  • A brandy distilled from white wine in the region around Cognac in France. 

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