cookery vs cordon bleu

cookery

noun
  • The art and practice of preparing food for consumption, especially by the application of heat; cooking. 

cordon bleu

noun
  • A skillful chef. 

  • An award given to such chefs. 

  • Thin slices of veal, ham and cheese breaded and sautéed; somewhat like a wiener schnitzel, or Viennese cutlet. 

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