Scotch whisky vs Scottish

Scotch whisky

noun
  • Whisky distilled in Scotland especially from malted barley. 

Scottish

noun
  • the people of Scotland. 

adj
  • Of a person, native to, born in or whose ancestors originally came from Scotland. 

  • Of a thing or concept, of or pertaining to Scotland. 

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