hatstand vs stark raving mad

hatstand

adj
  • Crazy, insane. 

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. 

stark raving mad

adj
  • Completely insane 

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