As long as she remembers to put the child on the potty, she probably experiences few accidents. Of course, there are exceptional children who do learn to use the potty at a very young age, but there is no rule of thumb. There is no magic day when every child should take his postgraduate course in bodily elimination. Each of our children is unique. Each has his own time to learn to be toilet trained.
Most children can start somewhere between eighteen months and two years.
Be sure that you as well as your child are ready for the experience. I tell parents, especially mothers that the key to potty training is to remain relaxed and calm. Don't get uptight and tense. Your child will sense your feelings and get up-tight and tense right along with you. Of course, this approach to discipline met with total disaster.