No idea how you would set the frequency (I think it might be motor timing but I have no idea), but I think I do know how to calibrate the ESC.
So first take off your prop, you don't want your prop to be on for this. Next, turn on the tx, once the tx is on move the throttle stick all the way up. Plug in the plane next, and once you hear the startup sequence and some extra beeps (not sure what beeps you would hear though), move the throttle stick down to zero. Not sure if this is the exact way to calibrate your esc, but this is that I have had to use in the past.