I rarely missed classes or took days off.
The administration allowed ten days off per year, and when I had accumulated 100, they cut it down to 30 and didnlt even tell me.
When I left, I should have accumulated about a year and a half of sick leave over 32 years.
Some of the women on the faculty took ten days off, sick or not.
The school had no substitutes, so a colleague who said she had migraines managed to get me to take something like 40 or so of her classes. I sort of expected some sort of gift or something for this, but mostly I did not even get a thank you.
One year she decided not to teach at all, but didn't tell the administration, and of course, I ended up taking her classes for three weeks. No thanks from anyone.