copilot vs dodger

copilot

noun
  • A backup or assistant pilot of an aircraft. 

verb
  • To serve as relief or assistant pilot. 

dodger

noun
  • Someone who dodges (avoids something by quickly moving). 

  • A person full of tricks or street smarts. 

  • An advertising leaflet; a flyer. 

  • A frame-supported canvas over the companionway (entrance) of a sailboat providing the on-deck crew partial cover from the splashes of the seas that break against the hull of the boat. 

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