Reset on ban (?)

So I've been wanting to know for a while, what's the situation regarding ban resets? Are there any? Back in Season 4 or 5, I got a 7-day(does that even exist?) or 14-day ban, can't exactly remember how long was it, I THINK that it was 7 days but I'm not sure whether this thing even exists, so probably 14 then. Does that carry on through the seasons or is there a way to reset it? So if I get reported and what I did is deemed as a punishable action it's going to be a perma-ban? The days I was offensive are long gone but it still nerves me to think about being on the brink of perma-ban for something that happened like 4 or even 5 years ago. Waiting for your responses!
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