This doesn't take into account maintenance, which makes a huge difference ! My EV car (hyundai ioniq 2016) has now 100'000 km (62'000 mi) and I never once went to the garage for a service (except for tyres of course). Brake pads are still new, no oil change needed, etc.. Can't imagine how much it would've cost on a gas car
So in short: service intervals for EV's don't seem longer than for ICE cars at all. They are pretty typical car service intervals of 10k-15k km BUT the key is they should be cheaper.