drink like a fish vs tope

drink like a fish

verb
  • To drink (especially alcohol) heavily and in excess. 

tope

noun
  • A small, grey, European shark, Galeorhinus galeus, that has rough skin and a long snout. 

  • A grove of trees. 

  • A mound-like Buddhist sepulchre, or memorial monument, often erected over a relic; a stupa. 

How often have the words drink like a fish and tope occurred in a corpus of books? (source: Google Ngram Viewer )