Probability density distributions of three parameters: surface area (left), lifetime (middle), and peak brightness (right), for EUV brightenings with (orange or blue) and without (grey) detected QPPs. The top row corresponds to QS brightenings and the bottom row to AR brightenings. The distributions are shown in log-scale for each parameter. Overplotted dashed curves represent Gaussian fits to each distribution, with vertical dashed lines indicating the mean values (μ) from the fits.