I've had the job go all the way between about 2 and 10, depending mostly on how rusty everything is, and how recently the job was done before.
My son has a 96 that spent much of its life on the Massachusetts seashore. It had apparently never been apart on one side. I did a hub on that, and not only was it seized in the bore, but the bolts were seized so badly in their bores that I had to shear two of them off, and even then the hub would not come out. I had to cut an ear off the hub, chisel the hub out, and even then I was unable to hammer the stub of one bolt out, and had to burn it out with a torch, bit by bit.
On the other hand, I've had a few that just popped off.
Make very sure that you clean the bore, clean the necks of the bolts, and apply anti-seize liberally when reassembling, and you'll be glad next time you need to do a U-joint.