Noncontinuous and Off-and-on

Noncontinuous adjective - Not continuing without interruption in time or space.

Off-and-on and noncontinuous are semantically related. In some cases you can use "Off-and-on" instead an adjective "Noncontinuous".

Off-and-on adjective - Intermittently stopping and starting.

Noncontinuous and off-and-on are semantically related. You can use "Noncontinuous" instead an adjective phrase "Off-and-on".