in deep shit vs knee-deep in the Big Muddy

in deep shit

prep
  • In trouble; up shit creek; in a difficult situation. 

knee-deep in the Big Muddy

adj
  • Stuck in a predicament; mired in a difficult situation, especially one resulting from poor judgment or bad leadership. 

How often have the words in deep shit and knee-deep in the Big Muddy occurred in a corpus of books? (source: Google Ngram Viewer )