hat rack vs hatstand

hat rack

noun
  • A piece of furniture used to store hats and clothing, consisting of a pole with pegs on a moderately broad base; a hatstand. 

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 hat rack and hatstand occurred in a corpus of books? (source: Google Ngram Viewer )