Coincident demand

A customer or class demand, in kilowatts or megawatts, at the time of a utility's system peak demand. It is the demand that coincides with the system peak and is often used in cost allocation. For example, industrial customers' demands at the time of the industrial class peak demand could also be considered as coincident demands, even though they may not be coincident with the system peak.

Source: UIE Guide to Electric Load Management in Industry