once every 5-6 days....I don't go by the week..its a never ending rotation, I don't do the "Monday is national chest day" routine LOL
cool, your split if much more close to the once a week split than the 2x pe week each body part bs. I think 6 days is the magic number, 7 can be a little too much and with 5 you are risking a burn out in the long run. I make the 7 days split mainly because that way it fits my social agenda and I dont need to work out during weekends and also I make sure I get one extra day off the limits of healing and run less risks of injuries.
But the point stands still, I have never EVER saw a big dude that used the train each body part 2x bull shit slip. 48 hours to recovery

my ass, two days after I hit a muscle is when I only start feeling the soreness and from that point I need at least more two full days to stop feeling anything.