Eddington ratio AGN (orange) and non-AGN control (blue) samples as a function of the age of the Universe. The solid lines indicate the median evolution for the whole sample, while the dashed lines indicate the 16th and 84th percentiles. The vertical dashed line indicates the median black hole seeding time (AGN and non-AGN), and the shaded region encompasses the values between the 16th and 84th percentiles. The samples being compared here are 𝒮_{M* & M200c}^WBH and 𝒞_{M* & M200c}^WBH.