Period distribution of contact binaries in our sample. Top panel: our full late-type and early-type samples (filled histogram) and their high-amplitude subsamples (dashed lines). Middle panel: comparison of our samples with the KEBC, where the dashed black line marks the full KEBC, and the filled histogram shows the period distribution of objects with morph ≥ 0.7. Bottom panel: our sample in comparison to the samples from OGLE (Soszyński et al. 2016), ASAS-SN (Jayasinghe et al. 2018, 2019, 2020), and the recent catalog by Green et al. (2023). The histograms in all panels are appropriately rescaled and, where available, weighted by the probability of being a contact binary of the respective type.