Almost the same as a new account. That being said, you can go up every few days more often than a brand new account.
Just because your account is old, IG will not let you turn on the turbo and let you like 1,000 photos, follow/unfollow 1,200 users and make 100 comments a day.
I put it like this: if you're accustomed to eating 3 times a day, you're not going to start eating 20 times a day the next day. So, start slowly, and within week you'll be eating 20 times a day. Same like Instagram.
For Instagram, slow is fast, and fast is good.