might vs necessitation

might

noun
  • Physical strength or force. 

  • The ability to do something. 

  • Power, strength, force or influence held by a person or group. 

verb
  • simple past tense of may Used to indicate permission in past tense. 

  • Used to indicate conditional or possible actions. 

  • Even though. 

  • Used in polite requests for permission 

  • Used to indicate a desired past action that was not done. 

  • simple past tense of may Used to indicate possibility in past tense. 

  • Used to express certainty. 

necessitation

noun
  • Necessity, understood as a logical or other philosophical principle, or as a law or force of nature. 

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