Perhaps I expressed myself poorly. I'm going to read you the sentence in English, rather than translate it. That will be easier.
Based on this analysis, for 1677 of 1775 incidents that occurred in the three year study period for which time information was available, 17% occurred during the period of 0800-1600h on weekdays.
Most of your troops are on the job between 0800 and 1600 hours during the week, but only 17% of incidents occurred during those hours.
Shouldn't the schedule be changed, in view of the fact that 83% of incidents do not occur between 0800 and 1600 hours on weekdays?