Waiting time probability distribution of MXFs from SGR J1935+2154. Black points show the full sample, while colored points correspond to subsamples selected by flux thresholds in units of erg cm⁻² s⁻¹. The solid black curve shows the best-fitting ElPln model, consisting of an exponential component (green dashed line) and a left-Pareto lognormal component (red dashed line). The short waiting time regime is dominated by the exponential component, whereas the longer waiting time regime follows a power-law behavior characterized by a power-law slope P(Δt) ∝ Δt^−0.64.