There is not a pre-defined UBE for initially populating the next count date. You should carefully consider how you might want to do this. In general, cycle counting is based on counting the same number of items each day (or each week). The number of items to be counted is determined, at least in part, by the resources available to do the counting and reconciliation. Then, you need to consider different frequencies for different types of items, as has already been suggested. If you don't aproach this in a systematic way, the number of items to be cycle counted could vary tremendously from day to day or week to week.
Many companies begin by manually selecting items to be cycle counted until all or most have been counted, then let the system do the selection based on next count date. You could also write a UBE to assign a next count date, but this would still involve a manual selection process to decide how to assign the dates. It's always a good idea to have a report listing items without a next count date, so new items aren't overlooked.