Composition of the dwell-time distribution of all intervals for Scheme 2 in which k_C2-C1 is set to 200/s, giving a t_C2/t_C1 ratio of 5. See legend of Fig. 3 for plot details. Compared with Fig. 3 where the t_C2/t_C1 ratio is 1, increasing t_C2/t_C1 fivefold greatly decreases the number of {C₁} intervals used to fill in the gap between {C₁C₂} and E₂ to complete E₂ at shorter times (gray areas in C and D and plot in E). Consequently, most of the {C₁} intervals go to generate E₁ so that E₁ approaches {C₁} (compare black dashed and green lines in A–C). Because so few {C₁} intervals go to E₂, E₂ is now described by {C₁C₂} for all but the shorter duration intervals (compare red dashed line to blue line in A, B, and D).