ne'er-do-well vs wild card

ne'er-do-well

noun
  • A person without a means of support; an idle, worthless person; a loafer; a person who is ineffectual, unsuccessful, or completely lacking in merit; a good-for-nothing. 

  • A person who is up to no good; a rogue. 

adj
  • Showing the characteristics of a ne'er-do-well: indolent, worthless, or roguish. 

wild card

noun
  • A competitor or team that is allowed to compete in a tournament despite not reaching the normal standards to qualify for inclusion. 

  • A card that can be assigned any value or used to substitute for any needed card. 

How often have the words ne'er-do-well and wild card occurred in a corpus of books? (source: Google Ngram Viewer )