This read-only Unsigned32 tracks the cumulative number of times this occurrence type has actually resulted in a logged event since the last reset, per its description, in the documented example, 51 threshold-crossing events out of 3253 underlying symbol errors. This is the counterpart to cienaCesOamEventLogRunningTotal, letting an engineer compute the ratio of raw occurrences to actual alarms raised, which indicates how tightly the threshold and window are tuned relative to the real error rate. An engineer tuning alarm sensitivity for a chronically noisy but low-severity link would use this ratio to decide whether to widen the window or raise the threshold so fewer, more meaningful events are logged.