greenness vs viridity

greenness

noun
  • Inexperience. 

  • The fact of being environmentally or ecologically conscious; commitment to environmental conservation. 

  • The state or quality of being green; green colour. 

viridity

noun
  • The state or condition of being virid. 

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