Time dependence of CC_mult for CanCeps (solid lines) and all Cepheids (dashed lines) in clusters of different mass as shown by the colour. The grey vertical dashed lines indicate the time t_He, end for the given metallicity. The histograms are binned by the Bayesian block method. The lines are shown for the interval marked by the occurrence of the first and last Cepheid in clusters in present models (the discretisation to individual Cepheids is the reason why all models do not reach exactly 300 Myr).