punchball vs punching bag

punchball

noun
  • A simplified version of the sport of baseball, where players use their fists as a bat and a softer ball. 

  • The soft ball used in this sport. 

punching bag

noun
  • 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. 

  • A person serving as an object of abuse. 

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