Measurement and understanding of electrochemical impedance spectroscopy of perovskite solar cells (PSCs) are nontrivial, as perovskite absorbers are a mixed conductor exhibiting both ionic and electronic motion. Moreover, the interpretation of the lowâfrequency spectra especially lowâfrequency resistance (R LF) is ambiguous. Some reports suggest that R LF is related to ionic transport resistance, whereas others attribute it with the recombination processes. Herein, more light is put on the quest of lowâfrequency impedance spectra of efficient PSCs. It is found that highâ and lowâfrequency resistances (R HF and R LF) follow a similar dependence on the applied bias and illumination with a comparable slope. These resistances are associated with the recombination processes in PSCs. The relation between lowâfrequency spectra of PSCs and the physical parameters such as the role of the interface, grainsâ sizes, and perovskite composition is studied. It is found that the lowâfrequency spectra of PSCs mainly depend on the grainsâ sizes and shift toward the high frequency, i.e., toward faster time constants with increasing the grain size. It is observed that these devices exhibit the lower recombination and higher openâcircuit voltage. A convenient way for the inâdepth analysis of PSCs, which will be crucial for designing betterâperforming PSCs, is provided.