hell's bells vs oh dear

hell's bells

intj

  • An expression of frustration, outrage, or surprise. 

noun

  • Jimsonweed (Datura stramonium). 

oh dear

intj

  • An expression of dismay, concern, worry or disapproval. 

How often have the words hell's bells and oh dear occurred in a corpus of books? (source: Google Ngram Viewer )