RichThesaurus
asleep at the wheel
vs
off guard
asleep at the wheel
adj
Synonym of asleep at the switch
off guard
prep
Not vigilant; unprepared; inattentive.
Unexpectedly or by surprise.
How often have the words
asleep at the wheel
and
off guard
occurred in a corpus of books?
(source:
Google Ngram Viewer
)