Evolution of number density (Y-axis) of quiescent galaxies in ALHAMBRA with redshift (X-axis), for different stellar mass bins (see inner-panels). Coloured dots illustrate number densities when using a 1/V_max formalism, whereas solid lines show the best fit to Eq. (1). From top to bottom, number densities obtained from BC03, EMILES+BaSTI, and EMILES+Padova00 SSP models (panels a, b, and c, respectively). Over-plotted, we show the evolution on the number density of massive quiescent galaxies, log₁₀ M_⋆ ≥ 11, with redshift from the previous work of Pozzetti et al. (2010, dashed line), Moresco et al. (2013, dotted line), and Moustakas et al. (2013, dash-dot line). In all cases, the number densities at the 0.5 <  z <  0.7 bin are excluded from the fit as explained in the text.