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 the current, still-open 24-hour bin for today, the number keeps climbing until midnight rollover, so it should be read as "so far today" rather than a finished daily total. On a 10 Gbps wholesale handoff port, a live reading of 308,408 frames/sec spiking well above baseline is what would prompt an admin to check for a broadcast or small-packet flood in real time.