The dependence of frequency n(RG) of red flashes on cluster parameters as derived from Monte-Carlo experiments. The left panel shows a dependence on M_c with m_l  =  0.01, 0.03, 0.06, 0.1, 0.25, 0.5, 1 m_⊙ (from top to bottom along the dotted line). The right panel shows a dependence of n(RG) on m_l with M_c  =  5  ×  10², 10³, 2.5  ×  10³, 5  ×  10³, 10⁴, 2  ×  10⁴, 5  ×  10⁴   m_⊙ (from top to bottom). The bars indicate statistical uncertainties derived in the experiments. The horizontal solid line marks the observed frequency of local RG-clusters within the completeness area of the cluster sample of 850 pc. The hatched area corresponds to the Poisson error of this estimate. The vertical dashed line in the left panel shows the estimated value of the average mass of formed clusters from Piskunov et al. (2008a).