During the week day is really the easiest.
- If you don't have freedom, you can always say you have a dentist or doctor's appointment. Tough to do multiple times a month.
Otherwise for evenings and weekends.
- Say you are going to gym. That covers you for up to 2 hours. Also, good excuse to smell showered up. If you don't have a gym membership then get one.
- Or get one of your friends to come with you and cover for you.
Hope that helps.