solidarity vs unicity

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. 

unicity

noun
  • The fact of being united as a whole. 

  • The state or quality of being unique or one of a kind. 

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