I think it's more like 25 to 30K. You can check the manual's warranty, it might say it there. But from what I understand, this is "anecdotal" limit. The main issue here is the shutter window. It moves in such a fast violent speed, that it can only snap so much before before breaking. Using a lot of continuous shots can add to the wear. That's why when I see kids in best buy holding the shutter button and shooting continuously for minutes at a time, I cringe.
I think the going rate for Nikon to replace the shutter is $150. So it's still not too bad. When shooting RAW+JPG, the shutter is only triggered once, so it only counts as one. I wouldn't worry about it too much though. But it could make you shoot for quality instead of quantity.