Title: Observed Trends in FRB Population and Bi-modality in the Luminosity Density Distribution

Abstract: We have considered both non-CHIME and CHIME FRBs in the present study. Our robust conclusion is that there are two categories of non-CHIME FRBs - high luminosity density and low luminosity density events, with majority of the repeaters falling in the latter category. In order to circumvent the non-availability of measured fluence and flux density of the CHIME FRBs, we have devised a novel dimensionless approach that utilizes the ratio of the estimated CHIME lower limits to the fluence as well as to the flux density to investigate the presence of trends and patterns in both non-CHIME as well as CHIME FRB population. We have introduced several physically meaningful dimensionless quantities, and one of the robust results is that the computed values of these are almost same for both CHIME and non-CHIME events. This universality is also seen in the distributions of the computed dimensionless quantities and the underlying trends. In the case of CHIME repeaters, distributions of few of the dimensionless quantities hint at the existence of two modes of repeating radio transients.