pleasance vs pleasantness

pleasance

noun
  • A pleasure ground laid out with shady walks, trees and shrubs, statuary, and ornamental water; a secluded part of a garden. 

pleasantness

noun
  • Something pleasant. 

  • The state or quality of being pleasant. 

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