pannikin vs vitrics

pannikin

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

  • The contents of such a vessel. 

vitrics

noun
  • The art or study of the manufacture and decoration of glassware. 

  • Articles of glassware collectively. 

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