Relation between eccentricity and transit number giving the amplitudes of TTVs indicated in the labels. In all cases, we considered the 3/2 spin-orbit resonance, which gives the highest amplitudes of the TTVs when compared to all the other rotational configurations. The maximum transit number shown in the figure (i.e., 2000 transits) corresponds to approximately 13 yr of transit events. More discussions are presented in the main text.