There is a certain adverbial pattern composed of "[NOUN] and [NOUN]".
We work day and night.
It's raining cats and dogs.
They're arguing / going at it hammer and tongs.
I've seen that "day and night" has a direct translation in many languages, so I assume this sort of adverbial phrase composed of nouns is not uncommon.
How do these phrases composed of nouns end up being used as adverbs? How do you analyse them? Is it a completely idiomatic structure, or is there some way to connect it to more regular grammar?