RichThesaurus
in a flash
vs
in two shakes (of a lamb's tail)
in a flash
prep
Instantaneously; very quickly; in almost no time.
in two shakes (of a lamb's tail)
How often have the words
in a flash
and
in two shakes (of a lamb's tail)
occurred in a corpus of books?
(source:
Google Ngram Viewer
)