Multus before "dē" and "post"(Latin)

[purasbabosadas]

I've found the examples "multīs de causīs"(for many reasons) and multōs post annōs"(after many years).Are "dē mutīs causīs" and "post multōs annōs" also considered idiomatic or used in Latin?.I know noun phrases are frequently split up by words(in this case "de" and "post") in Latin,but i'm wondering if both word orders are possible with "multus" in this case

 

[Snodv]

Yes, it's fine. A preposition between a noun and its modifier is quite common but not required.