RichThesaurus
rub salt in the wound
vs
throw gasoline on the fire
rub salt in the wound
verb
To make an injury, physical or emotional, feel worse.
throw gasoline on the fire
verb
Synonym of add fuel to the fire.
How often have the words
rub salt in the wound
and
throw gasoline on the fire
occurred in a corpus of books?
(source:
Google Ngram Viewer
)