emptiness vs nothingness

emptiness

noun
  • A void; a nothingness; something lacking existence. 

  • The state or feeling of being empty. 

  • A nonexistence; a lack of existence. 

nothingness

noun
  • A void; an emptiness. 

  • The quality of inconsequentiality; the lack of significance. 

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

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