As stated by the poster above, it's a bad idea to freeze Polaroid the biggest issue besides that is your chemicals drying out. The 100c and 3000b film have no batteries unlike the 600 speed film so it should last longer in the fridge. Most very old packs (ie over 6 years) are useless the chemicals have dried out and therefore don't spread and in the case of the battery ones the battery dies.
You should be ok for a few years at least but the colour may become unstable after a time.