hatstand vs retarded

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. 

retarded

adj
  • Extremely stupid. 

  • Delayed; delayed in development, hindered; impeded. 

  • Designating a parameter of an electromagnetic field which is adjusted to account for the finite speed of radiation. 

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