Trigeminal nerves are stimulated based upon pulse counting and chronobiology. A cutaneous electrode assembly is applied to the forehead to stimulate the ophthalmic nerves. A method may include determining a number of pulses to be administered to a patient based upon the disorder being treated, and pulsing current through an electrode assembly to stimulate the patient's supraorbital and supratrochlear nerves with the determined number of pulses. Another method may include determining a pulse repetition frequency for pulses to be administered to a patient based upon the disorder being treated, and pulsing current through an electrode assembly to stimulate the patient's supraorbital and supratrochlear nerves at the pulse repetition frequency.