Notes. Best-fit parameters for the power-law model describing the frequency dependence of the activity window’s peak phase (μ) and FWHM (δ) for FRB 20121102A and FRB 20180916B. The fit follows the relation presented in Sect. 3. Parameter A characterizes the amplitude of the scaling relation, while B describes the steepness of the frequency dependence. Subscripts μ and δ are used to distinguish between the fits corresponding to the peak phase and the FWHM, respectively. The reported uncertainties represent 1σ confidence intervals, derived from the square root of the diagonal elements of the covariance matrix obtained during the fitting process.