for it vs in trouble

for it

prep
  • Facing punishment for a misdeed. 

  • In order to attain some implied goal. 

  • Corresponding in volume. 

  • Used other than figuratively or idiomatically: see for, it. 

in trouble

prep
  • Liable to be punished for misbehavior; in disgrace. 

  • Pregnant, unmarried, and not likely to be married before giving birth. 

  • Suffering difficulties. 

adj
  • in a difficult situation 

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