Period distribution for the NGC 2264 cluster, as inferred from the population investigated in this study (black filled bars). Only single-period objects are considered here to build the histogram. The inset box to the right of the main period histogram shows the period distribution that would be derived, for the cluster, when completing our sample with the period detections obtained, in order of preference, by Affer et al. (2013, shaded in red) or Lamm et al. (2004, cross-hatched in black) for additional cluster members with no light curves in the CoRoT 2011 dataset.