go under vs keep one's end up

go under

verb
  • To enter a trance, state of hypnosis, etc. 

  • To be named; to call oneself. 

  • To collapse or fail, e.g. by going bankrupt. 

  • To descend into a body of water; to founder. 

keep one's end up

verb
  • do one's part 

How often have the words go under and keep one's end up occurred in a corpus of books? (source: Google Ngram Viewer )