The interval in seconds over which the data is
sampled for each bucket in the part of the usrHistory
table associated with this usrHistoryControlEntry.
Because the counters in a bucket may overflow at their
maximum value with no indication, a prudent manager will
take into account the possibility of overflow in any of
the associated counters. It is important to consider the
minimum time in which any counter could overflow on a
particular media type and to set the usrHistoryControlInterval
object to a value less than this interval.
This object may not be modified if the associated
usrHistoryControlStatus object is equal to active(1).