Sean, that's the way I do it: Keep it in the freezer, take out a few sheets after thawing it completely, put the box back in. Norway doesn't tend to get any warmer than New Zealand, but I buy large amounts of film when I cn get any - every few years.

Don't worry about "cosmic energy"! The reason film gradually deteriorates in cold storage is background radiation, only some of which is cosmic radiation. And none of it is radio frequency "cosmic energy".