On the standard plan you get one counter service, one table service and one snack per night. So if your stay is seven nights, you get seven of each meal. But you can use them in any order from the moment you check in until midnight on check-out day. So on a seven night stay you would get eight days to use up the credits. You are free to eat two counter service meals one day and only table service the next, you just have a fixed number of credits.