Blue data points taken from Brandenburg et al. (2017; Table 3) (Sun with a diamond) for F- and G-type stars referred to as the short inactive branch. The red data point are labelled the short-term cycles found in this work (the corresponding rotational periods are mentioned in the text) including the cycle and rotational period of τ Boo taken from Mittag et al. (2017). The red square data point marks HD 100563 where the significance of the period are comparable low and therefore, we consider this object only as a candidate for a short-term activity cycle.