RichThesaurus
clean as a hound's tooth
vs
clean as a whistle
clean as a hound's tooth
adj
Very clean; very innocent.
clean as a whistle
adj
Very clean
Completely innocent; beyond moral reproach.
How often have the words
clean as a hound's tooth
and
clean as a whistle
occurred in a corpus of books?
(source:
Google Ngram Viewer
)