ceramic vs slipware

ceramic

noun
  • A hard, brittle, inorganic, nonmetallic material, usually made from a material, such as clay, then firing it at a high tempature. 

  • An object made of this material 

adj
  • Made of material produced by the high-temperature firing of inorganic, nonmetallic rocks and minerals. 

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 ceramic and slipware occurred in a corpus of books? (source: Google Ngram Viewer )