BIG vs hatstand

BIG

noun
  • A biological insulation garment; an air-tight, full-body suit intended to prevent the spread of contaminants. 

hatstand

noun
  • A device used to store hats upon, consisting of a vertical pole with a sturdy base to prevent toppling, and an array of pegs to hold the hats. 

adj
  • Crazy, insane. 

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