drinking horn vs flugelhorn

drinking horn

noun
  • A drinking vessel fashioned from an animal's horn. 

flugelhorn

noun
  • A brass instrument resembling a cornet but with a wider, conical bore, and usually with three valves, in the same B-flat pitch as many trumpets and cornets but with a more deeply conical mouthpiece than those. A bugle with valves. 

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