draft dodger vs fly-by-night

draft dodger

noun
  • A person who illicitly seeks to avoid compulsory military service (the draft). 

fly-by-night

noun
  • One who departs or flees at night in order to avoid creditors, law enforcement etc. 

  • A traveling businessman or tradesman. 

  • A creature which flies at night; a nocturnal flier or traveler. 

  • A person or business that appears and/or disappears rapidly, appearing untrustworthy, or giving an impression of transience. 

How often have the words draft dodger and fly-by-night occurred in a corpus of books? (source: Google Ngram Viewer )