Where to put ShowFPS and ShowLatency for multiplayer game?

Playing around with som multi-player stuff and would like to have a counter in the upper left showing fps and/or the latency.

Now the question is, where's the best place to put this? On the PlayerObject and only check if isLocalPlayer? How often would be ideal to check for latency with networkClient.GetRTT()? I'm guessing every Update() is a bit overkill.. :P

Any help appreciated.