Comparison of observed number densities and upper limits on the rarity probed by various observed (gray steps) and simulated (colored lines) volumes. Number densities correspond to 10^11.0 < ℳ < 10^11.5 ℳ_⊙ and 10^11.5ℳ < 10^12.0 ℳ_⊙ from the total sample (light and dark gray, respectively), and 10^11.5ℳ < 10^12.0 ℳ_⊙ from the quiescent sample (orange) from Fig. 8. 1σ upper limits are computed following Gehrels (1986), which for the observed volumes are dependent on widths of redshift bins.