For Necropolis/Haven/Cove, it's normal to capture a second castle in 3 weeks, but for Stronghold and Inferno, it's very difficult to do it before 4 weeks...
For Necropolis/Haven/Cove, it's normal to capture a second castle in 3 weeks, but for Stronghold and Inferno, it's very difficult to do it before 4 weeks...