how many people are supposed to be on grill?

every time ive worked, its only me, and its starting to kill me. i just cant keep up with absolutely everything, and i dont get breaks because there's never time/an opening for them. plus, with me being the only griller, there's no one to take my spot while i break. 8+ hours having to balance two lines, rices, and meats just doesnt seem like a job for one person. it feels like itd make more sense for it to be two people, one to keep up with rices/pots and one to stand over the grill and handle meats. does anyone elses store just have one grill?