hatstand vs off the chain

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. 

off the chain

prep
  • Free from work or direct supervision. 

  • Crazy and exciting; delirious and wild. 

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