level set vs make peace

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 

make peace

verb
  • To settle a dispute or disagreement. 

  • To end hostilities; to reach a peace agreement. 

  • To initiate or resume a cordial relationship after a period of animosity. 

  • To accept something, especially if it is considered unfavourable. 

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