ceramic vs discoid

ceramic

noun
  • An object made of this material 

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

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

discoid

noun
  • A disk-shaped dental excavator designed to remove the carious dentin of a decayed tooth 

adj
  • Shaped like a disc/disk. 

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