RichThesaurus
blow the whistle (on)
vs
stab in the back
blow the whistle (on)
stab in the back
verb
To betray (somebody).
noun
An act of betrayal or treachery
How often have the words
blow the whistle (on)
and
stab in the back
occurred in a corpus of books?
(source:
Google Ngram Viewer
)