emptiness vs pregnancy

emptiness

noun
  • The state or feeling of being empty. 

  • A void; a nothingness; something lacking existence. 

  • A nonexistence; a lack of existence. 

pregnancy

noun
  • The progression of stages from conception to birth. 

  • The condition of being pregnant; an instance of this. 

  • The period of time this condition prevails. 

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