Spencer Szabatin

Hey everyone, I have a question about when it's acceptable to move from a Jr. Colorist to a Sr. Colorist? Just wondering if there is a timeline, like an apprenticeship would have (4-5 years)? I've been editing for just over 2 years, color correcting for a year and have completed several courses on grading and correction. To clarify I'm not going to call myself a Sr. colorist anytime soon but I'm just wondering what to expect going forward in the coming years. Cheers