>>312156No, actually, "how many objects verb 5 subjects in 6 minutes" is not fine.
If you say "how many fish eat five men in six minutes", every listener, unanimously, will think that "five men" is the object (because it's after the verb), and that "fish" is the subject (because it's before the verb). You absolutely cannot transpose object and subject in English, because English doesn't use particles to mark them, and English doesn't conjugate them to mark them, and the one and only way you tell the subject and the object in English is that the subject is the first noun phrase to the left of the verb.
If you put a different noun phrase in front of the verb, that noun phrase becomes the subject.
>Not sure if it's "officially" grammatically correct but a native speaker might use such a construct.Please, please stop doing that ESL thing where you tell native speakers how their own language works. There's nothing wrong with being wrong; there's a lot wrong with being all butthurt about it.