Is it a frost free freezer? if it is, then you shouldn't have any issues, if it's NOT frost free, I would shoot a roll and test it, if it's fine, then it's fine, the only concern is if moisture actually penetrated the can itself through the felt and then froze to the emulsion and then burst/cracked the emulsion and then you would have an issue but in the short time period you mentioned I very much doubt any issues could arise even if the freezer is not frost free it should be fine as the frost most likely would only have penetrated the top layer which will be exposed when you load the film in the camera anyway.