You can get your money back in as little as 1 day!
It is a sentence I heard from an advertisement. Sadly, I cannot tell if this is what the advertisement said, for I did not pay much attention to this till now.
If you see the "as little as 1 day" part, you can easily infer that it is the object of the preposition "in", meaning "as little as 1 day" should be a noun. However, I find that hard to believe. First, let me make this clear that I do not have any specific, credible information that can back up my own theory.
But I think that, as this "as little as 1 day" is an adjective phrase that has to compare 1 day with some other period of time, a noun should be present before "as little as 1 day" in this form.
You can get your money back in some period of time as little as 1 day!
Well, it doesn't sound brilliant but seems to convey the meaning.
I know that not putting noun before the adjective phrase "as little as 1 day" is fine, but it feels strange, when I think logically, to perceive an adjective phrase as the object of a preposition (in this case, in).
So, what type of grammar rule or anything of sort licenses this?