Looking at the last 3 DLC they seem to be released roughly every 3 months, Dawnguard in june, Hearthfire in sept and Dragonborn in December. The reason I'm wondering is that I have just finnished my 3rd playthrough and will take a break from Skyrim for a while now. However, I will want to start a new character in advance of any new DLC as I did with Dragonborn.
So does anybody know how Bethesda tend to work with DLC time wise? In the meantime I have ordered Fallout 3 which I believe has 5 DLC available so I'm hoping that will keep me busy until hopefully there is some new DLC for Skyrim.