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Fig. 5.

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Histograms of the periods of detected QPPs. Left panel: Histogram showing periods of up to 120 s. Right panel: Logarithmic histogram showing the full range of periods. Note that periods below 15 s are excluded, as we applied a conservative criterion requiring detected periods to be at least five times the observational cadence of 3 s. The dashed red line represents the normal distribution in log space, with a mean of 21.6 s of QPP periods observed in standard solar flares (Hayes et al. 2020).

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