CircularSquare

Does anyone know of a site that has the depths of all stations in the system? Also, is there a map of these depths?

Sometimes at Queens Plaza the E train waits in the station for a while, then an M train comes. The announcement says "the M train will be departing the station first" or something like that, and it does.

Is there a place showing train frequencies per line? I've heard various snippets of information, but no organized thing.