in a world of pain vs in it

in a world of pain

prep
  • Synonym of in a world of trouble 

  • Suffering pain. 

in it

prep
  • In trouble. 

  • Taking part in something, such as a lottery. 

  • Having an expected payout or reward. 

  • Getting on successfully, especially in a game. 

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