Same as Fig. 4 bur for thee Cosmic evolution of BH-166. Its evolution differs from BH-G9685 mainly by a higher number of encountered major and minor mergers during its life, respectively 3 and 9. Hence, the mass gained through BH mergers is here much higher, with a value of f_BH, merger = 27.3% at z = 0.18. Note that from its birth to T_Universe = 0.81 Gyr, we were unable to estimate the variations of Ψ_star, BH as this BH is not affected to a galaxy yet following our selection criteria (it is a “wandering” BH).