incoherence vs unconnectedness

incoherence

noun
  • The quality of not making logical sense or of not being logically connected. 

  • Something incoherent; something that does not make logical sense or is not logically connected. 

  • Thinking or speech that is so disorganized that it is essentially inapprehensible to others. 

unconnectedness

noun
  • The state or property of being unconnected (not connected or joined). 

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