hatstand vs sit upon

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. 

sit upon

noun
  • small, portable cushion for sitting on 

  • buttocks, bottom 

verb
  • Synonym of sit on (“block, suppress, hold back”) 

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