Final answer:
An accident involving continuous or repeated exposure to harmful conditions is referred to as an 'occurrence'.
Step-by-step explanation:
An accident, including continuous or repeated exposure to substantially the same general harmful conditions, is otherwise known as a(n) occurrence. This term is often used in health, safety, and insurance contexts to describe an event or series of events that result in injury or damage. To understand this concept, consider examples like long-term exposure to cigarette smoking leading to chronic health effects, or a careless hiker accidentally starting a wildfire, which would be a singular occurrence with extensive damage.