Just wondering about this progression

2011-2014: GEO3
2015-2017: Went to HQ, got GEO4 in 2016.
2018-current: Posted to school as SH, got GEO 5 in 2020. Officially appointed HOD from 2021.

Currently at GEO5. Wondering how long does it take to reach SEO level usually? Isn't it better to stay at GEO5, as there are many SEO officers, HOD level?