emptiness vs vacuity

emptiness

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

  • The state or feeling of being empty. 

  • A nonexistence; a lack of existence. 

vacuity

noun
  • Physical emptiness, an absence of matter; vacuum. 

  • Idleness; listlessness. 

  • Emptiness. 

  • An empty or inane remark or thing. 

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