establish vs level set

establish

verb
  • To prove and cause to be accepted as true; to establish a fact; to demonstrate. 

  • To form; to found; to institute; to set up in business. 

  • To appoint or adopt, as officers, laws, regulations, guidelines, etc.; to enact; to ordain. 

  • To make stable or firm; to confirm. 

level set

verb
  • To establish a baseline of mutual understanding 

noun
  • An event consisting of level setting 

  • The set of values x for which a real-valued function f(x) is equal to a given constant. 

  • A state of mutual understanding among parties 

How often have the words establish and level set occurred in a corpus of books? (source: Google Ngram Viewer )