RichThesaurus
clean as a hound's tooth
vs
irreprehensible
clean as a hound's tooth
adj
Very clean; very innocent.
irreprehensible
adj
not reprehensible, blameless, without blame; innocent
How often have the words
clean as a hound's tooth
and
irreprehensible
occurred in a corpus of books?
(source:
Google Ngram Viewer
)