hard liquor vs schnapps

hard liquor

noun
  • A distilled beverage with a high alcohol content, such as brandy, whiskey, or vodka. 

schnapps

noun
  • A type of distilled alcoholic beverage (liquor), often with a herbal or fruit flavoring, typically drunk neat as an apéritif or digestif. 

  • A serving of this beverage. 

How often have the words hard liquor and schnapps occurred in a corpus of books? (source: Google Ngram Viewer )