magnifying glass vs pannikin

magnifying glass

noun
  • An instrument made of convex glass, used to magnify. 

pannikin

noun
  • A durable cup or other vessel used for drinking made of metal and coated in enamel. 

  • The contents of such a vessel. 

How often have the words magnifying glass and pannikin occurred in a corpus of books? (source: Google Ngram Viewer )