for it vs in for it

for it

prep
  • In order to attain some implied goal. 

  • Facing punishment for a misdeed. 

  • Corresponding in volume. 

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

in for it

adj
  • Irrevocably committed to something. 

  • In trouble. 

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