verdurous vs virescent

verdurous

adj
  • Freshly green; verdant; covered with verdure, or consisting of it. 

  • Having youthful or new qualities. 

virescent

adj
  • Green-like, greenish. 

  • Becoming green. 

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