Top: background colours indicating the prediction for the minimum rotation period expected for single stars from the models in Tayar et al. (2015): <30 days in dark grey, 30–90 days in medium grey, 90–180 days in light grey, and >180 days in white. For comparison, we overplot the measured rotation periods for stars in our sample using the same period bins as dark grey squares, medium grey diamonds, and light grey triangles. Bottom: fraction of stars with detected rotation periods in bins of mass and surface gravity. Dark grey indicates bins where >30% of the stars had detected rotation, medium grey indicates bins with 10−30% detections, light grey indicates bins where fewer than 10% of stars had detected rotation periods, and white indicates bins with either no stars or no detected rotation periods. We have also indicated the regions we define as “intermediate mass” and “low-mass red clump”.