How often do you eat – once a week – twice.
A dog needs two to three meals per day just like a person.
Some dog foods have a recommended portion per day based on size or type of dog you have. For example, the bag might say that a 50lb dog needs two cups of food per day.
So – you either put down two cups and then let the dog eat when it wants to or you divide that two cups into two or three meals and put a bowl of food down two or three times per day.
Of course, two cups was just an example since I have no idea what size your dog is or what food you are going to feed them.
On second thought – just find the dog a new home. You are not capable of having a dog.