hey hey! Don't need to say that out loud. If you can't then you can't if you can then you can, no need to go into details why.
It took me 4 weeks because the first whole week when i got the game i played 2 or 3 missions a day on the Devil Hunter difficulty. Later on i smashed through Son of sparda mode on 2 days. Afterwards i wanted to do a little bloody palace and got a record of 30 floors before i continued on DMD.
That took around a week and got me pretty bored on bloody palace. DMD took me around 2 weeks to fix because the times i died i just didn't care to continue. Ohh and because i loved the Angelo Credo fight so i just died when he where about to die and restarted the boss battle.