in the sky vs upstairs

in the sky

upstairs

adv
  • Up the stairs; on a higher floor or level. 

  • In heaven, especially with regard to where a deity might be found. 

  • In the brain or mind. 

noun
  • A woman's breasts. 

  • An upper storey. 

adj
  • Located on a higher floor or level of a building. 

  • Pertaining to a pitched ball that is high, and usually outside the strike zone. 

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