aridity vs emptiness

aridity

noun
  • A long-term lack of rainfall or moisture. 

emptiness

noun
  • A nonexistence; a lack of existence. 

  • The state or feeling of being empty. 

  • A void; a nothingness; something lacking existence. 

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