This read-only Integer32 (0 to 65535, in errored frame seconds) defines how many one-second intervals containing at least one frame error must occur within the summary window to trigger this event, per its description, defaulting to just one errored second. Because 'errored seconds' counts intervals with any error rather than raw error count, this metric is less sensitive to burst size and more sensitive to how spread out errors are over time, which is a useful complementary view to the raw errFrame threshold. An engineer distinguishing a link with one bad burst versus one with errors trickling in across many separate seconds would use this errored-seconds metric, since both scenarios could produce very different values here despite similar total error counts.