I have already replied : In meetings, there are 2 races in one day (1 warm-up and a half because the lap time is short), in championships there are 4 races in 2 days (with 4 warm-ups because the lap times are longer).
Again, mental approach issue was pointed out by his staff after Osaka. If Asafa worked with a psychologist, 1) it was useless because the result in Beijing was the same as Osaka 2) maybe the psychologist was not competent, OR maybe he didn’t worked with a psychologist because maybe 1) the staff changed opinion 2) anyway the problem was not adressed because the trick might not be in Asafa’s head.