Here i found confusing sentences:
Ref to documentation
This property specifies how often the reminder should be displayed based on application usages. For example, if this property is set to 1, this means that each time the Notify method is called a reminder will be displayed. If the property is set to 10, then it will be displayed only once in 10 usages.
This property also specifies how often the reminder should be displayed. The difference is, that it doesn't matter how many are the usages, but how long the application has been used since the installation. For example, if this property is set to 1 day, the reminder will be displayed only once a day.
In this second "RecurrencePerUsageCount" you meant exactly "RecurrencePerTimePeriod"? If I am right please correct it :)
Btw. these controls rocks.