intelligibility vs solidarity

intelligibility

noun
  • The quality of recorded speech of every word being understandable. 

  • That which is intelligible; the degree to which something is intelligible. 

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 intelligibility and solidarity occurred in a corpus of books? (source: Google Ngram Viewer )