hatstand vs knockabout

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. 

knockabout

adj
  • Boisterous 

  • Suitable for rough use. 

noun
  • An act of playing a sport casually or informally. 

  • A worker habitually engaged in casual employment. 

  • A small sailboat lacking a bowsprit, of a type found primarily in the Massachusetts area. 

  • A person living in rough, violent conditions. 

  • A tumbler. 

  • A slapstick comedian or comedy. 

  • Clothing suitable for rough use. 

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