porcelain vs tea service

porcelain

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

  • Synonym of cowrie. 

  • Synonym of china: porcelain tableware. 

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

  • A hard white translucent ceramic, originally made by firing kaolin, quartz, and feldspar at high temperatures but now also inclusive of similar artificial materials; also often (figurative) such a material as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. 

tea service

noun
  • a set of matching crockery for serving tea; normally a teapot, cups, saucers and small plates etc.; some items may be silver 

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