Work Schedule Rules - for compressed work week

Hi - I am working on a Time Eval project and the company offers a few compressed work week options. Work an additional 21 minutes per day, get one day off per calendar month; work an additional 50 minutes per day, get one day off per bi-weekly period; work an additional 25 minutes per day, get one half day off per biweekly period. Has anyone created work schedules for this purpose? Is it best to create 3 work schedule rules, and have time eval put the additional minutes/hours into a quota, and then the employee would enter an absence to take the time off? I look forward to your responses! Thanks.