D.C. Mun. Regs. tit. 22, r. 22-B8499
In this chapter, the following terms and phrases shall have the definitions ascribed:
Absence occurrence - An employee is absent when he/she does not report to work as scheduled. An absence occurrence may be for one day or multiple consecutive days of absence. For example, an employee who has been absent for four days (Monday through Thursday) has incurred one absence occurrence. Absences separated only by an employee's regular days off still count as one occurrence. For example, if an employee is absent on Friday and Monday, and Saturday and Sunday are the employee's regular days off, the Friday and Monday absences count as one occurrence.
Excessive - Repeated unscheduled absence occurrences over a period of time including, but not limited to, two (2) or more absence occurrences in any month, five (5) or more absence occurrences in a six (6) month period, nine (9) or more absence occurrences in a year.
Patterned - Absences that are similar and repetitive in nature, including but not limited to, days taken in conjunction with scheduled days off, same day each week, day before or after pay-day or holiday.
D.C. Mun. Regs. tit. 22, r. 22-B8499