Disk fraction as a function of period. In both plots, circles show the center of each period bin, while horizontal bars indicate the size of the bin. The bins show fast, intermediate, slow, and very slow rotators. Observational data from the present study are shown as black. Top: the number of stars in each bin is shown for each point. Bottom: disk fractions resulting from M2 simulations from Vasconcelos & Bouvier (2015) for 5.1 Myr and 10.1 Myr are shown together with the fraction observed in CygOB2.