bathtub gin vs who shot John

bathtub gin

noun
  • Gin or a similar alcoholic beverage which is of very poor quality, as if made by a homebrewer in a bathtub. 

who shot John

noun
  • Liquor, especially illegally made. 

  • Nonsense; rubbish. 

  • Long and involved explanation, finger-pointing, or assignment of credit or blame. 

  • Something bad; a mess. 

How often have the words bathtub gin and who shot John occurred in a corpus of books? (source: Google Ngram Viewer )