Recovery rate and fraction of non-detections of stellar rotation period as a function of stellar spectral type. Left: fraction of stars for which the literature periods were recovered (either directly or in a harmonic or alias relation). Right: fraction of stars that show no significant clusters (including stars without a literature rotation period). In the plots we distinguish between inactive and active (pEW(Hα) < −0.5 Å) stars by using solid and hatched bars, respectively. In the left panel, the number on top of each bar denotes the number of stars with a known rotation period for each category. In the right panel, it yields the overall number of stars in the selected sample. For better readability, we chose normal black font for the inactive sample and italic grey font for the active sample.