Garden of Eden vs Happy Valley

Garden of Eden

noun
  • A pattern that can only exist as an initial state and is not reachable from any other state. 

name
  • In the Book of Genesis of the Bible and Surat Sad of the Qur'an, a garden at the source of the Gihon, Pishon, Tigris, and Euphrates rivers, where Adam and Eve first lived after being created. 

Happy Valley

How often have the words Garden of Eden and Happy Valley occurred in a corpus of books? (source: Google Ngram Viewer )