If your coming in with zero 121 time and based on your seniority you could be flying around 200-500 a year. Just depends. Upgrade just depends on the factors above.But I would expect from Zero 121 time it could take around 2-3 years. This is not a job to build 121 time fast, it is a QOL job if you live in base. I came in with previous 121 time and it took a little over 2 years for me to upgrade but some of that was waiting on a class.