Most learners finish a regulated qualification in three to six months studying part time alongside work, at roughly three to five hours a week.
Smaller qualifications can be done in six to eight weeks if you have evidence ready. Larger Level 5 qualifications more often take six to nine months.
The two things that decide it are how quickly you gather workplace evidence and how quickly you respond to assessor feedback. You can pause and resume at any point within your enrolment period.