Frequency of 24 μm excess in the sample listed in Table 1 of Chen et al. (2020) for early-type stars (2−2.5 M_⊙, black filled dots) and for solar-type stars (1−1.5 M_⊙, grey empty dots). The frequencies measured in this work are marked with a blue filled dot for B–A stars and with a cyan empty dot for solar-type stars. All the markers have sizes inversely proportional to the distance of the cluster.