Standard is 44 hours

Usually 8 to 5. That is 8 hours per day, excluding lunch break.
So 5 days * 8 = 40 hours
You may also need to come back half day to round the patients.

For example, a weekend comprise of sat and sun.
Sometimes come back on sun for 4 hours, some times sat for 4 hours.
So times weekend free but the following weekend you have to round both days.