open up vs shut up

open up

verb
  • Synonym of cheat out (“to face or turn toward the audience more than would be natural”) 

  • To begin running, driving, travelling, etc., at maximum speed. 

  • To commence firing weapons. 

  • To rain. 

  • To open. 

  • To widen. 

  • To reveal oneself; to share personal information about oneself; to become communicative. 

shut up

verb
  • Of a person, to stop talking or (of a person or thing) making noise. 

  • To terminate (a business). 

  • To close (a building) so that no one can enter. 

  • To put (someone or something) in a secure enclosed space, such as a room or container. 

adj
  • Closed up or off, as in a building that no one is to enter. 

intj
  • Stop talking, crying, etc. 

  • I don't believe it!, no way! 

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