This object captures the value of the frame counter from the sample just before the FrameErrorThreshold was reached, preserved so a manager can reconstruct the condition that triggered the threshold event, and it resets when the condition becomes active. An administrator uses it alongside the current frame count to calculate exactly how many frames occurred during the fault window. For example, subtracting this baseline from the live frame counter tells the admin precisely how many frames were processed between the last healthy sample and the threshold-triggering event.