Relevant timescales for interaction between a 10⁴ M_⊙ companion and an accretion disk. We consider the following physical processes: Bondi accretion timescales (Equation (20) for a hot (dotted gray line) and cold (gray band) disks. The cold disk has a band that represents the uncertainty in the mass estimation of the disk. We also depict the GW decay timescale (black line, Equation (7)), and GR precession for zero and 0.9 eccentricity (purple band, Equation (5)), as well as the orbital timescale of the companion. We also show the possible type-II migration of a companion in a cold disk (green line, Equation (22)). Finally, we show the minimum timescale associated with a companion crossing the disk perpendicularly (Equation (16)), while assuming e_c = 0.9. We adopt again a cold (purple solid) and a hot (purple dashed) disk. It is interesting to point out that this timescale is consistent with Sgr A* variability timescales.