level set vs ratification

level set

noun
  • A state of mutual understanding among parties 

  • 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. 

verb
  • To establish a baseline of mutual understanding 

ratification

noun
  • A formal declaration of agreement to a treaty etc. 

  • The act or process of ratifying, or the state of being ratified. 

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