hatstand vs pinhead

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. 

pinhead

noun
  • The head of a pin. (Frequently used in size comparisons.) 

  • A foolish or stupid person. 

  • A telemark skier. 

  • A newborn cricket used as food for pets. 

  • A human head that is unusually tapered or small, often due to microcephaly, or a person with that trait. Often promoted in freak shows as "human pinheads". 

  • The immature juvenile fruiting body of a mushroom prior to its gills opening. 

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