Cava vs champagne

Cava

noun
  • A Spanish white sparkling wine made using the méthode champenoise. 

champagne

noun
  • Any sparkling wine made by the méthode champenoise. 

  • A very pale brownish-gold colour, similar to that of champagne. 

  • A sparkling white wine made from a blend of grapes, especially Chardonnay and pinot, produced in Champagne, France, by the méthode champenoise. 

  • A glass of champagne. 

  • Any sparkling white wine. 

verb
  • To drink champagne. 

  • To ply or treat with champagne. 

adj
  • champagne 

  • Of a very pale brownish-gold colour, similar to that of champagne. 

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