gup vs pie in the sky

gup

noun
  • Gossip or rumor; nonsensical or silly talk; blather. 

  • An elected head of a gewog in Bhutan. 

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 gup and pie in the sky occurred in a corpus of books? (source: Google Ngram Viewer )