Chaotic diffusion in the action and frequency domains: estimate of instability timesGabriel Teixeira Guimarães and Tatiana Alexandrovna MichtchenkoEur. Phys. J. Spec. Top., 232 18-19 (2023) 3147-3154DOI: https://doi.org/10.1140/epjs/s11734-023-01017-x