Final answer:
An example of a valid WO event is receiving a paycheck with a bi-weekly frequency and a period of two weeks between each payment.
Step-by-step explanation:
To identify valid WO events in the context of this question, we can think about WO (Work Order) as any regular task or occurrence in one's routine. Let's proceed with an example of receiving a paycheck, which is a common event that many individuals can relate to. Identifying the period and frequency of this event involves understanding how often the event occurs and the interval between each occurrence.
For instance, if you receive a paycheck every two weeks, the frequency of this event is once every two weeks. The period refers to the length of time between each paycheck, which in this case is two weeks long. Therefore, the paycheck has a bi-weekly frequency with a period of two weeks.