Histogram of age derived from chromospheric activity is shown in linear and logarithmic scale as in to Fig. 10. The distribution shows that the majority of Her-Lyr candidates with measured activity level is younger than 500 Myr with the logarithmic plot showing a concentration around 250 Myr. The two older stars identified in the linear plot are HD 207129 and G 270-82. The youngest star in the logarithmic plot is DX Leo.