Your only going to get detailed info from the players if they choose to share it and some do actually.

Like myself- you can determine i really only play on about 2-4 servers a day based on leveling thralls for example at 2 hours a pop.

Some may post about building time even with creative mode thats a 2- 4 hours session or even longer.

You can check out twitch and see also how long people are RPing for-

That info is available for free without Funcoms intervention.