incongruity vs solidarity

incongruity

noun
  • A thing that is incongruous. 

  • The state of being incongruous, or lacking congruence. 

  • An instance or point of disagreement 

solidarity

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

  • 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. 

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