| Schedule | Total Weeks | Hours/Week | Effectiveness | |----------|-------------|------------|---------------| | | 4 | 25–30 | Risky; high burnout, lower retention | | Standard (2–3 months) | 8–12 | 10–15 | Optimal for most working professionals | | Extended (4–6 months) | 16–24 | 5–8 | Good for non-native English speakers or those with heavy work travel |

This confirms that for meaningful gains.