joystick vs woodchipper

joystick

noun
  • A mechanical device consisting of a handgrip mounted on a base or pedestal and typically having one or more buttons, used to control an aircraft, computer, or other equipment. 

  • A penis. 

verb
  • To manoeuvre by means of a joystick. 

woodchipper

noun
  • A machine for reducing wood to woodchips 

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