I can't say how much water to apply how often as there is a lot of variability due to temperatures, amount of sunlight, characteristics of growing media, and size of the rose bushes. Your best approach is to dig down a few inches and feel the soil. If it is moist don't water. It is much easier to overwater those plants since they have very limited roots due to being dug up and most of the growing media has no roots to "pump" out the water. It will take some time for the transplanting shock to lessen and for those roses to establish new roots and resume normal growth.
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