This, probably, doesn't help much, since I can't provide a table of repair-times but you might have simply engaged a player that uses 2 repair kits there (a small and a big one).
Most tanks shouldn't go below like 3-4 seconds repairing their tracks (and that's with like 100% repair, BiA, large repair kit and possibly "premium" food).
Not sure what knowing all repair times would do you any good either, since the times vary so much with what equipement, crew, consumables, types of tank the other players use.
Remembering all of that would, likely, be a pain.
The thing you could take from that though, is that tracking a TD or heavy twice isn't always going to be enough.
Knowing that there are 2 repair kits and that tanks don't usually repair within 1-2 seconds should help you estimate what kinds of consumables the enemy uses.
If they don't repair quickly the second time, then you can assume that you can easily circle them.
If they do though, you might have to wait for a 3rd track or be safe and wait for help from your allies.
I mean, if you're a 1-shot for the enemy, why would you risk anything anyway, unless you're very certain about the situation?