RichThesaurus
go pit-a-pat
vs
pitter-patter
go pit-a-pat
pitter-patter
noun
A soft, percussive sound, as of tiny feet, or of rain on a rooftop.
How often have the words
go pit-a-pat
and
pitter-patter
occurred in a corpus of books?
(source:
Google Ngram Viewer
)