oh my stars vs slap my ass and call me Judy

oh my stars

intj
  • An expression of surprise or astonishment. 

slap my ass and call me Judy

intj
  • An expression of astonishment upon learning something unbelievable (usually positive). 

How often have the words oh my stars and slap my ass and call me Judy occurred in a corpus of books? (source: Google Ngram Viewer )