Predicted TTVs of Kepler-160 c for various MMRs of the nontransiting planet Kepler-160 d. Times of the transit mid-points are given along the primary x-axis in units of the BKJD and on the secondary x-axis in units of the Coordinated Universal Time (UTC). For reference, BKJD = 7000 d corresponds to 2 March 2028. Panel a: predicted TTV curves for all resonances shown in Fig. 9. The color-coding of the curves is described in the legend. Panel b: zoom into the final ~ 2000 d of our simulations. For clarity, the curves are restricted to some of the most diverging resonances (see labels) and the 5:2, 5:3, 7:2, 7:3, and 7:4 MMRs have been excluded.