Class 0 and 2 (i.e., non-Blazhko) stars from Kepler and K2 on the modulation frequency – relative side-lobe amplitude diagram (see footnote 12). For comparison, the Galactic Bulge Blazhko map is replotted. Also shown are the injection tests to assess detection efficacy. We used the non-Blazhko stars with the following injected modulation frequencies: f_m = 0.004 and 0.03 c/d for Kepler and f_m = 0.025 for C08 of K2. The K2 injected result is plotted for all the available data sources (i.e., there are multiple points for the same object).