land of Nod vs seventh heaven

land of Nod

name
  • The state of sleep, or an imaginary place that one inhabits when asleep. 

seventh heaven

noun
  • A state of great joy and satisfaction. 

  • The outermost of the heavenly spheres; a dwelling of the angels. 

How often have the words land of Nod and seventh heaven occurred in a corpus of books? (source: Google Ngram Viewer )