Evolution of the fraction of galaxies without any cluster association with redshift for two mass ranges: 2 < M^⋆ [10¹¹ M_⊙] < 3 and 3 < M^⋆ [10¹¹ M_⊙] < 4.2, with corresponding halo masses from 1.4 to 4.1 × 10¹³ M_⊙ and 0.41 to 1.4 × 10¹⁴ M_⊙. In black are the common matches between optical catalogues. The grey colour shows the PZWav complete sample, blue is PZWav after richness selection, red is VT, green is AMICO, and pink is the contribution of all (PZWav sub-sample) optical catalogues together.