Bottom: Structure function and time difference pairs considering all SF-points (τ, SF) for all the 43 840 sources with enough number of epochs (Sect. 3.2). The blue region shows the depletion of pairs with τ between 0.3 and 28 days, introduced by limitation in the Gaia timeseries sampling. Top: Distribution of τ as a function of the frequency in which sources had a valid SF(τ). The blue horizontal line shows the 40% limit used to infer the blind timescale range of Gaia.