Fraction of galaxies that have spent less than a given time in various RPS zones during the first passage of their infall orbit. We consider two bins of infall redshift and compute the cumulative times corresponding to three different lower limits for RPS, as indicated in the legend. The y-axis is the fraction of galaxies that spend less than δ_t Gyrs in regions whose RPS value exceeds the one considered. We show the results for low-mass galaxies with 9 <  log M_⋆ < 9.5 in this plot. The results do not depend significantly on stellar mass.