Probability of a galaxy hosting an AGN as a function of redshift. Each point corresponds to a galaxy in the MAMBO lightcone, colour-coded in different ℳ bins indicated in the legend. For comparison, the points with error bars connected by dashed lines show the AGN fraction derived in A18, also in different mass bins. Vertical dotted lines mark the centre of the three redshift bins studied in B16; namely, z = 0.55, 1.15, 2.0.