claycourt vs pottery

claycourt

noun
  • A court whose surface is made of crushed shale, stone or brick. 

pottery

noun
  • Fired ceramic wares that contain clay when formed. 

  • The potter's craft or art: making vessels from clay. 

  • A potter's shop or workshop, where pottery is made. 

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