That's probably ok. I ended up ruining mine be repeatedly heating it without anything in it (I kept getting the burner knobs mixed up). Eventually the enamel coating popped off the iron core. So there is some temperature sensitivity in the enamel coating. Granted, I was stupid. I should have been more careful. :(
The word is coating, not coting. I have never tried this but I suppose you could. If you are afraid something might happen to it just take it out of the freezer and temper it in two stages: 1. transfer it to your fridge first 2. leave it there for 1 half hour to one hour, preferably the latter. 3. remove from fridge and let it reach room temperature before using in stove or oven.