The way I play and the length I play it is complicated to explain, so I'll break it down to parts.
Pre-DOA5 boner control training: 30 minutes
Pre-DOA5 Christie doll training: 5 minutes
Pre-DOA5 self-pity control training: 10 minutes
DOA5 lab training: Every moment I'm playing DOA5
Playing DOA5: 1-2 hours, sometimes 5 hours a day on a free day.
NOTE: (If I quit suddenly, it means I neglected my boner training while using Christie's Vampirella costume or catsuit. Still a work in progress... >.<)