Do chill and freeze stack?

Question is simple as that. In my experience I feel like things tend to unfreeze and not be chilled, so I'm not really sure how the two interact. (This would be relevant for an item like Dyadus.)

Chill and freeze get applied at the same time, but chill has longer duration per formula so will last a bit after the target unfreezes. There's a passive that gives you 'enemies become chilled as they unfreeze' mod that makes chill start its timer once the enemy unfreezes instead of right away.