Plasmoid frequency, measured as the number of plasmoids generated along the current sheet per minute, plotted against Lundquist number S_L for each simulation case. Results are displayed for cases with uniform resistivity (top panels, with 2k, 4k, and 8k cases in separate panels) and anomalous resistivity (bottom panels, with Syntelis-19, YS-94, and Gudiksen-11 cases in separate panels). For cases within a certain range of Lundquist numbers, the plasmoid frequency scales roughly with Lundquist number by a power law , and best-fit curves for these cases are plotted as dashed lines in each panel. The curve for the adiabatic power law is plotted as a dotted line for the cases where a nearly adiabatic scaling between plasmoid number and Lundquist number occur. A vertical line marks the Lundquist number below which steady reconnection occurs and above which plasmoid-mediated reconnection occurs. Cases U1, 4kU1-2, 8kU1-2, S1, and Y1 have no plasmoids, as indicated by the label placed inside the steady-reconnection regime.