congeniality vs level set

congeniality

noun
  • The quality of being congenial; the state of being agreeable or of having similar tastes. 

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 

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