Weird... I can't edit, it hasn't even been that long lol.
I found this in my old text files that I copied from a now dead d2 site... a very... very long time ago...:
3.4 Slowing Effects
Slowing effects, such as Slows Target By X% items, Holy Freeze, and chill from cold attacks, are treated as negative skill based FRW.
Effect FRW Run/Walk Speed Charge Speed Remarks
Chill from a cold attack -50 % -2.00 yards/s -4.50 yards/s -50% effect applies only to players. Monsters have their own values.
Slows Target By X% item -100 % on client
(-X% on server) -4.00 yards/s
(X% x -0.04 yards/s) -9.00 yards/s
(X% x -0.09 yards/s) This ability is bugged. See the notes below.
Holy Freeze aura - Slow % Slow % x -0.04 yards/s Slow % x -0.09 yards/s -
Decrepify curse -50 % -2.00 yards/s -4.50 yards/s -
Another source:
https://www.theamazonbasin.com/wiki/index.php/Chill_effectiveness