Relative fraction of the stellar associations younger than 3 Myr at different separations between clusters/associations and centres of the regions. Only a sub-sample of 40 well-resolved superbubbles and star clusters younger than 40 Myr are considered. Each separation bin corresponds to 0.3R_eff. Errors are calculated from 1000 Monte Carlo realisations with positions of each cluster randomly varying within the PSF of the MUSE observations.