This read-only Counter64 reports the transmit frame rate for this PM instance, sampled per second. It is the egress counterpart used to catch an outbound small-frame burst — for example a replicated multicast or broadcast storm — while it is still happening; because it is drawn from this instance's running statistics bin, it behaves like a long-running total rather than a rotating window, so admins baseline against it instead of expecting it to reset daily. On a 10 Gbps aggregation trunk carrying multiple EVCs, a live reading of 257,807 frames/sec spiking well above baseline is what would prompt an admin to check for a broadcast or small-packet flood in real time.