it's seconds. i don't think we have formal documentation anywhere yet, but you can see it in the metrics request, and you can see an example of that here https://cdn.discordapp.com/attachments/844600078948630559/1316105056319176785/all_metrics.txt?ex=6759d5d9&is=67588459&hm=9410f89d40592704f82cdcc3191a9c620a85e4eed6c6b88c7770e732e4d9dbeb&