pleasance vs pleasure ground

pleasance

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

pleasure ground

noun
  • The parts of a large garden designed for the use of the owners, as opposed to the useful kitchen garden and the wider park. 

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