In your experience/opinion, what would you consider an normal average of days per year for someone to call in sick to work? Examples: once every month, two months, 5, 10 days a year? What do you consider excessive?
For a normal, healthy adult--3-5 days a year. If they are required to use sick days for doctor/dentist appointments, at least 5.
But if they have a medical problem, like surgery for appendicitis, two weeks.
If they have small children and their employers requires them to use their sick days to take care of sick children at home, all available sick days that they have.
A lot depends on the expectations of the employer, as well. I've worked places where you were expected to show up unless you were hospitalized. And I've worked other places where if you had a cold or the flu or a stomach bug, they wanted you to stay home so that the entire office wouldn't come down sick.
My brother was hit by a car while riding his bicycle one Saturday. His leg was broken and required surgery, which couldn't be done until Monday. So he was in the hospital from Saturday to Tuesday, released from the hospital Tuesday, took Wednesday off as he still felt groggy and returned to work on Thursday. On Friday, he was called into the big boss's office and counseled on his "excessive" absences. Yes, Monday-Wednesday, the first three sick days he had taken in 5 years of employment at that company. (He was also told to stop riding his bike. Six months later, he had a new job.)