Blend Management Data types - Examples

In the Blend Management, when defining the style items, following UDC values are much required.

Can someone explain with examples about the functionality on the below given Data Type ( UDC 31B/DT )

Counter Day: Track longer time periods, for example, the time spent in a particular type of barrel.

Counter Event: Track the number of times an action has been performed, for example, the number of times the bulk material in a barrel has been stirred.

Timer Day: Track the days that have elapsed between the on event and the off event in days.

Date: Track style definition by date.