Magnetic variability for the stars studied in this work. Left column: Phase-folded magnetic field data along with the best fit sinusoidal function with periods from Table 2. The average magnetic field, both from the averaged spectra and the sinusoidal fit are shown as dotted and dashed lines, respectively. Right column: Periodograms of the magnetic sample, red lines marks the literature periods used for the sinusoidal fitting. False alarm probabilities are marked with dashed lines.