RichThesaurus
fly into a rage
vs
vent one's spleen
fly into a rage
verb
To become very angry
vent one's spleen
verb
To openly express pent-up anger, often on an unrelated matter or person.
How often have the words
fly into a rage
and
vent one's spleen
occurred in a corpus of books?
(source:
Google Ngram Viewer
)