I'll be a son of a gun vs oh my heck

I'll be a son of a gun

intj

  • Expressing surprise or disbelief. 

oh my heck

intj

  • for "Hell" from "Oh my hell" or "Oh hell!" 

How often have the words I'll be a son of a gun and oh my heck occurred in a corpus of books? (source: Google Ngram Viewer )