ceramics vs slipware

ceramics

noun
  • The art or science of making ceramic objects. 

  • Ceramic objects as a group. 

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