Based on what you've told us, it looks like you're covered by the Hospitality Industry (General) Award [MA000009].
Under the Hospitality Award, an RDO is a 24-hour period between rostered shifts. An accrued day off (ADO) is a paid day off, which the employee has accumulated by working extra hours.
Full-time employees can accumulate an ADO over a 4-week roster period, if the employer agrees to it. They can accumulate up to 5 days off.
ADOs should be rostered next to an employee’s normal day off, where possible.
Employees can’t work for more than 10 days in a row without an RDO.
Employers and their employees can agree to take an ADO off in part day amounts.
Check the Hospitality Award for full information on ADOs and RDOs.
Source reference: Hospitality Industry (General) Award [MA000009] clause 15.1