Hello....Is there a charm for freeze?My weapon has two charm slots and I would like to add freeze to it..Where can I but the charm? Thanks

No there are no charms for skills like freeze.
The charms just add points to the stats :
- Strength
- Agility/Dexterity
- Intelligence
- Constitution
- Mana
- Vitality

All about charms

However you can find a good weapon with the freeze skill like a sword.

Barta

You will have to rely on luck or reloading to find a weapon with Frost on it.
If you quick save before running your mouse over an item/chest/merchant or hitting the alt key, you can identify the item or trade with the merchant, then quick load to get different stats or inventory. This can be done repeatedly to get the best stats or specific bonuses on an item (save after finding good candidates) or looking for specific items (such as spell books or charms) from merchants. Don't waste too much time with this, though, it really isn't necessary to get the best possible equipment.