TL:DR Provide 3 years of living history (formal rentals, staying with family/friends, or hotels all count). You just need the full address, dates, and property type for each.
You need to provide 3 years of address history, but it doesn't have to be formal rentals—living with family, friends, or in student accommodation all count. Just make sure you have the full address, move-in/out dates, and property type for each place you've stayed.