catlinite vs pottery

catlinite

noun
  • A red clay from the Upper Missouri region, used by the natives for their pipes. 

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 catlinite and pottery occurred in a corpus of books? (source: Google Ngram Viewer )