heavens vs oh my stars

heavens

intj
  • An expression of surprise, contempt, outrage, disgust, boredom, or frustration. 

noun
  • The distant sky of the sun, moon, and stars. 

oh my stars

intj
  • An expression of surprise or astonishment. 

How often have the words heavens and oh my stars occurred in a corpus of books? (source: Google Ngram Viewer )