Probability distribution function of δB/B (left column) and δB²/2B² (right column), for fast (top row), Alfvénic slow (middle row), and non-Alfvénic slow (bottom row) winds. Left panels: vertical dotted lines refer to δB/B = 2. In panels d and e, the dashed lines display the exponential dependence of δB²/2B² on the cosine of the rotation angle ϕ. The time increments are evaluated using 15 logarithmically spaced lags, Δt, from 1 s (red lines) to ∼4 × 10⁴ s (blue lines).