Dissociation time calculation. The gray histogram shows the distribution of lookback time obtained from the dissociation points. The black solid line shows the multiple Gaussian distribution obtained through the GMM fitting, and the individual Gaussians are as black thin dashed lines. The two significant dissociation times τ_d1 and τ_d2 are highlighted as red and yellow lines, respectively. The number above each Gaussian represents the individual contribution to the total fitting. The inset plot shows the AIC test.