First panel: Redshift evolution of the fraction of galaxies that underwent an ejection of their central MBH due to GW recoils (f_ejection). Second panel: Median time spent in the dynamical-friction phase (t_DF) by MBHs that re-filled an empty galactic nucleus due to a GW ejection. Third panel: Redshift evolution of the median redshift at which the MBH was ejected from the center of the galaxy (z_ejection). The colour coding and mass dependence are the same as in Fig. 4.