Frostburn lists on Table 2–5: Deities of the Frostfell (42) Levistus as granting his clerics access to the domain Icebergs and Vatun as granting his clerics access to the domain Snow. These domains don't appear in Frostburn or its errata. Are more details about these domains available elsewhere?
People have asked about this occasionally for a long time (https://forum.rpg.net/showthread.php?283457-D-amp-D-Frostburn-missing-domains ) It seems likely that they were either replaced by the 'cold' and 'winter' domains, or cut entirely and the entry not updated.
Anyways, if your using them for an NPC, or want to submit something to your DM to ask if you can use their is a fan suggested writeup of the domains here: