level set vs solidarity

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 

solidarity

noun
  • A bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group. 

  • Willingness to give psychological and/or material support when another person is in a difficult position or needs affection. 

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