1. A method comprising: delivering electrical stimulation to a patient via a first electrode combination; delivering electrical stimulation to the patient via a second electrode combination on a time-interleaved basis with the electrical stimulation delivered via the first electrode combination; incrementally increasing an amplitude of the electrical stimulation delivered via the second electrode combination while the electrical stimulation delivered via the second electrode combination is delivered on a time-interleaved basis with the electrical stimulation delivered via the first electrode combination; and incrementally decreasing an amplitude of the electrical stimulation delivered via the first electrode combination while the electrical stimulation delivered via the second electrode combination is delivered on a time-interleaved basis with the electrical stimulation delivered via the first electrode combination.