Per its DESCRIPTION, this Counter64 counts one-second intervals with at least one P-bit parity error. Because this is a lifetime counter that only resets on an explicit clear, a reading here means the DS3 circuit logged a P-bit errored second on this DS3 circuit, accumulated over the port's entire service life, not merely since the last reboot. For example, a reading of 9 seconds in this bin on this DS3 circuit rising in lockstep with Pcv confirms the far-end parity errors are frequent enough to affect whole seconds, not just isolated bits.