[Bruno]

Rough Answer: It Depends Highly On The Type Of Armor.

And I suppose in what condition you're assuming the raw materials to be in. Making mail takes a lot of grunt labor, even longer if you need to also smelt the ore, forge the ingots, and draw the wire. Scale's another one with a ton of little fidly bits that need to be crafted then assembled. The less parts in the armor, the easier it is to create, and the closer to "finished" your raw materials are, obviously the faster it gets but the more expensive your raw materials are.

Wood armor has the additional problem of needing to season the wood before starting any work, to a lesser extent leather usually involves three weeks or so of patiently waiting for the leather to dry/tan/cure, with only a day or so of actual labor involved.