in it vs up a gum tree

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. 

up a gum tree

prep
  • In a difficult situation; in a predicament. 

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