discoid vs lamination

discoid

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

adj
  • Shaped like a disc/disk. 

lamination

noun
  • Something made by laminating. 

  • A foliation of a closed subset of a manifold by subspaces of one dimension less. 

  • The process of laminating, joining together thin layers. 

  • A small scale sequence of fine layers that occurs in sedimentary rocks. 

  • A layer of something that is laminated. 

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