Scotch vs malt whiskey

Scotch

name

  • The opening 1. e4 e5 2. Nf3 Nc6 3. d4. 

noun

  • A glass of Scotch. 

  • Whisky distilled in Scotland, especially from malted barley. 

  • Any variety of Scotch. 

  • The people of Scotland. 

malt whiskey

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