phantasy vs pie in the sky

phantasy

noun
  • The innate, mental image of an object; the link between instinct and reality. 

pie in the sky

noun
  • A fanciful notion; an unrealistic or ludicrous concept; the illusory promise of a desired outcome that is unlikely to happen. 

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