off work—
1. not working temporarily (owing to illness, etc.):
- Steven was off work last week. He had been bitten by the family dog.
2. not engaged in work:
- This was the first time she was going to see me during the day because she was off work.
out of work—unemployed; unable to obtain work:
- The poor woman must have a hard time of it, for her husband is out of work.