plaid vs polychromate

plaid

adj
  • Having a pattern or colors which resemble a Scottish tartan; checkered or marked with bars or stripes at right angles to one another. 

noun
  • The typical chequered pattern of a plaid; tartan. 

  • A type of twilled woollen cloth, often with a tartan or chequered pattern. 

  • A length of such material used as a piece of clothing, formerly worn in the Scottish Highlands and other parts of northern Britain and remaining as an item of ceremonial dress worn by members of Scottish pipe bands. 

polychromate

adj
  • Composed of many colours 

noun
  • A salt or ion composed of multiple chromate groups 

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