Evolution of the median timescales for acceleration or losses (see Sect. 2.4) experienced by electrons (here, we consider γ = 10³ as a reference) released by radio galaxies in Run1 (top) and Run2 (bottom). Timescales for loss terms and shown as negative, while timescales for gain terms are shown as positive (to ease the comparison with radiative losses, the latter timescale is also mirrored in the upper panel). The timescales for shock acceleration (τ_DSA) and for Coulomb losses (τ_C) are not visible as they are much smaller and much bigger, respectively, than the time range covered by the vertical axes in the plots.