punching bag vs wildcat

punching bag

noun
  • A person serving as an object of abuse. 

  • A tough bag, usually cylindrical, filled with air, sand, or other material, often suspended so that it swings freely, which is punched or kicked when practising sports such as boxing or martial arts. 

wildcat

noun
  • A person who acts like a wildcat, (usually) a violent and easily-angered person or a sexually vigorous one. 

  • A bobcat (Lynx rufus) or other similar New World species of lynx. 

  • Any feral cat. 

  • An offensive formation with an unbalanced line and a snap directly to the running back rather than the quarterback. 

  • A wheel that can be adjusted so as to revolve either with or on the shaft of a capstan. 

  • Felis silvestris, a common small Old World wild cat somewhat larger than a house cat. 

verb
  • To drill for oil in an area where no oil has been found before. 

adj
  • Unauthorized by the proper authorities. 

  • Of or concerning businesses operating outside standard or legitimate practice, especially 

  • Of or concerning customized or hand-made cartridges. 

  • Of or concerning oil exploration in new areas, (particularly) small, independent operations. 

  • Of or concerning actions undertaken by workers without approval or in defiance of the formal leadership of their trade unions. 

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