Overview of the cosmic SFR, volumetric SNe IIn rate and relative SNe IIn rate. Top panel: SFR calculated from UNIVERSEMACHINE DR1 (Behroozi et al. 2019). Middle panel: resulting SNe-IIn rate determined using Eq. (1). The solid lines denote rates from the power-law IIn-to-CC ratio, and the dashed lines represent the rate for a constant ratio of 0.047. The contribution from each mass bin is plotted for comparison. Bottom panel: total relative volumetric SNe IIn rate. The gray line represents a line of agreement between the two models.