Typical timeframe
Most candidates need 8-16 weeks to move from CLB 7 to CLB 9, depending on baseline consistency and weekly study volume.
Weekly workload
A practical target is 8-12 hours per week: two full mocks, two section-drill sessions, and one focused correction session using your error log.
Main accelerator
Concentrate on the weakest module first. Raising one lagging component from CLB 7 to CLB 9 often matters more than polishing already strong sections.