RichThesaurus
for a fact
vs
indeedy-doody
for a fact
adv
Without doubt.
Used other than figuratively or idiomatically: see for, a, fact.
indeedy-doody
adv
Indeed.
How often have the words
for a fact
and
indeedy-doody
occurred in a corpus of books?
(source:
Google Ngram Viewer
)