Comparison between the cumulative spectral energy rate distribution for two hyperactive repeaters at different observing frequencies and times. Left: FRB 20220912A at 408 MHz (white stars; this work), 1.25 GHz (orange circles; Zhang et al. 2023), 1.4 GHz (green pentagons and red squares; Feng et al. 2023; Hewitt et al. 2024 and 1.572 GHz (blue diamonds; Sheikh et al. 2024). The 95% C.L. UL for R(E_ν > 2.5 × 10³⁰ erg Hz⁻¹) from our 1.4 GHz observations is plotted as a black downward arrow. Right: FRB 20201124A at 600 MHz (pink stars; Lanman et al. 2022), 650 MHz (blue squares; Marthi et al. 2022), 1.25 GHz (orange circles; Zhang et al. 2022) and 1.4 GHz (green diamonds; Kirsten et al. 2024). The 95% C.L. UL for R(E_ν > 2 × 10³¹ erg Hz⁻¹) from P (334 MHz) resulting from non-detections in Kirsten et al. (2024), is plotted as a blue downward arrows.