nothingness vs unbeing

nothingness

noun
  • The state of nonexistence; the condition of being nothing. 

  • A void; an emptiness. 

  • The quality of inconsequentiality; the lack of significance. 

unbeing

noun
  • Nonexistence. 

  • A nonbeing; an entity of no existence or significance. 

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