dead from the neck up vs hatstand

dead from the neck up

adj

  • Very stupid; brain-dead. 

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. 

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