The very broad rule of thumb is that 3-6 months of active playing while not being validly reported reduces your punishment level by one tier.
The punishment schedule is:
10 game chat restriction
25 game chat restriction
14 day ban
permanent ban
Since you had a 14 day ban, your next punishment would be a permanent ban. If you've been actively playing for the 2-4 months since your punishment, you're possibly down one punishment level. That would make your next punishment another 14 day ban.
If you were planning on being punished in 5 months (of active playing), that would either be a 25 game chat restriction or a 14 day ban, depending on if you decayed the second tier or not.