absence of mind vs inexistence

absence of mind

noun
  • A state or the quality of being absent-minded (abstracted, preoccupied). 

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. 

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