This counter records the number of frames marked yellow and then dropped by the flow policer during the archived historical interval. A nonzero historical value tells an admin that excess-rate traffic on this flow was actually discarded, not just deprioritized, during that past period, which could explain a reported service issue from that time. For example, if a customer reported dropped calls last Tuesday, the admin would check cmQosFlowPolicerHistoryFMYD for Tuesday's bin to see whether yellow-marked voice frames were being dropped.