increase random distribution hours

[cizio]

Hi, I noticed that the software tends to position the hours of the subject always at the same time, every day when the teacher is present.
For example, the math teacher of class 1 always meets the class at the 5th hour every day.
I would like to ask if it is possible to increase the rate of random distribution of hours, in order to vary the time when the teacher meets the class.

thanks
Maurizio