Scotch vs Scotch malt whiskey

Scotch

noun

  • A glass of Scotch. 

  • Whisky distilled in Scotland, especially from malted barley. 

  • Any variety of Scotch. 

  • The people of Scotland. 

name

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

Scotch malt whiskey

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