attain vs go under

attain

verb
  • To reach or come to, by progression or motion; to arrive at (a place, time, state, etc.). 

  • To gain (an object or desired result). 

  • To come or arrive, by motion, growth, bodily exertion, or efforts toward a place, object, state, etc. 

go under

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

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

  • To be named; to call oneself. 

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

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