good grief vs my foot

good grief

intj
  • An expression of dismay and disgust. 

  • An expression of surprise or shock. 

my foot

intj
  • Indicates disapproval, disregard, disdain, disgust or disbelief. 

  • Used other than figuratively or idiomatically: see my, foot. 

How often have the words good grief and my foot occurred in a corpus of books? (source: Google Ngram Viewer )