Left panel: normalised frequency of mass-ratios. The dashed line represents a power-law function with index γ = 0. Right panel: the cumulative frequency distribution of mass-ratios using the two methods outlined in Sect. 5.2. Method (i) The red line represent the derived mass ratios. Method (ii) The black dots, dark and light blue-coloured area represent the average, 1σ and 3σ variation in frequency from 100 realisations of the mass ratio, respectively.