A survival analysis of the 40 14,251.6-ns simulations that all captured the self-assembly of Octacid4•xylene at 298 K showed xylene's mean complexation time to be 1,022 ns (95% confidence interval: 750-1,392 ns). Here the complexation time was defined as the first time instant at which xylene was inside the host cavity and had its phenyl plane parallel to the axial axis of the host. This xylene orientation was found in the most populated Octacid4•xylene conformation. To dissect the self-assembly kinetics, the duration of the first step is herein termed priming time, and the duration of the last two steps is termed ingress time. These names are used because during the first step the host and guest conformations are primed, through self-selection and conformational rearrangements, for guest ingress and because during the last two steps the guest enters the host cavity and rotates ~90° to form a complex. The complexation time is now a sum of the priming and ingress times. This dissection reveals that the ingress time (8-934 ps; Table ) is a fraction of the priming time (12-14,199 ns; Table ), and hence the contribution of the ingress time to the complexation time is inconsequential. In other words, the guest ingress is so fast that the complexation time is determined primarily by the priming time.