open up vs widen

open up

verb
  • To widen. 

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

widen

verb
  • To become wide or wider. 

  • To make wide or wider. 

  • To convert to a data type that can hold a larger number of distinct values. 

  • To broaden or extend in scope or range. 

  • To let out clothes to a larger size. 

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