:) It really depends on the frog, their age, individual personality. . .as well as what their tank looks like (if it's planted with lots of hiding spots or not), and how many of them there are!
They seem to be more active when kept in pairs or groups, and also if there are lots of plants for them to play in. The sense of security that plants and other frogs bring seems to bring them out more, but a single frog on it's own will still be active - they're social, but don't NEED friends to be happy.
In my experience, they spend their days hanging around in plants, or floating at the surface, and become super active in the evenings and at mealtimes. If you feed them in the early evening (5ish), you'll be rewarded with a ton of activity until lights-out.
I'm not sure what to compare them TO as far as activity is concerned, but sure! They're active enough :)