RichThesaurus
get someone's goat
vs
get under one's goat
get someone's goat
verb
To annoy or infuriate someone.
get under one's goat
verb
To irritate or annoy someone; to bother.
How often have the words
get someone's goat
and
get under one's goat
occurred in a corpus of books?
(source:
Google Ngram Viewer
)