What is "clustering" in relation to epilepsy?

What is "clustering" in relation to epilepsy?

Charles Ribak, Ph.D. (Professor of Anatomy and Neurobiology, UC Irvine School of Medicine) gives expert video advice on: What is a "photosensitivity" seizure trigger?; What is an "automatism"? and more...

With epilepsy, ‘clustering' occurs when a person will maybe go a month without having any seizure, and then in the morning, they'll have a complex partial seizure. Then, later in the same day they could have two or three more seizures. So, when you go for quite a while without having seizures, and then in one day you have multiple seizures which seem to be in the same 24-hour time period, this is referred to as the "clustering" of seizures.