porcelain vs slipware

porcelain

noun
  • A hard white translucent ceramic, originally made by firing kaolin, quartz, and feldspar at high temperatures but now also inclusive of similar artificial materials; also often (figurative) such a material as a symbol of the fragility, elegance, etc. traditionally associated with porcelain goods. 

  • Synonym of cowrie. 

  • Synonym of china: porcelain tableware. 

  • A kind of pigeon with deep brown and off-white feathers. 

  • An object made of porcelain, (particularly) art objects or items of tableware. 

slipware

noun
  • A type of pottery identified by its primary decorating process where slip is placed onto the dry surface by dipping, painting or splashing. 

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