Calculated rates for PC and TD as a function of the two most uncertain parameters: the number of possible target bodies for the disruption (N_target for PC, N for TD) and the power-law index q. Blue solid line: TD rate, which is insensitive to q. Blue dash-dotted lines: the TD rate, if the planetary mass is shifted up or down by a factor 2, illustrates the rate dependence on the mass of the disrupting body. Red lines: PC rate, for q = 2 (dotted line)and q = 3.5 (dashed line). The circle marks 10⁸ target bodies, which is of the same order as was estimated in Lawler et al. (2015).