How long does it take to cook a 7 lb ham?

A web site I visited says thawing in refrigerator will take 4 to 5 hours per pound for a small ham, and 5 to 7 hours for a large ham. To thaw in cold water, it takes 2 to 3 hours for a small ham and 30 minutes per pound for a large ham.

Cold water method doesn't make sense. Why would a large ham take less time? Should that be 30 minutes per pound for a small ham and 2-3 hours for a large ham?

No, they mean 2 to 3 hours TOTAL TIME to thaw a small ham in water, and 30 minutes PER POUND to thaw a large ham.