Top panel: probability distribution function of log₁₀T_surv∕T₀ for various values of u₀, the normalised distance of the initial condition of the system to the two neighbouring first-order two-planet MMRs. We see that for u₀ = 0.5, the time distribution is log-normal as observed in Hussain & Tamayo (2020). Bottom panels: mean and standard deviation of the distribution as a function of u₀. We also plotapproximate fits to the curves. We note that the mean remains within an order of magnitude of its maximum for almost all values of u₀. For u₀ close to 0.5, the standard deviation is close to the value 0.43 ± 0.16 measured byHussain & Tamayo (2020), plotted as a green line with its 1σ error.