inexistence vs powerlessness

inexistence

noun
  • The state of not being, not existing, or not being perceptible. 

  • The state of existing in something 

  • That which exists within; a constituent. 

powerlessness

noun
  • The state or character of being powerless; absence or lack of power. 

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