lay bare vs open up

lay bare

verb
  • To expose to view, reveal, uncover. 

  • To make bare; strip. 

open up

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

  • 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. 

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