In my primary building, there are 40 stairs between the first floor and the second floor, and 30 stairs between all other floors. I'm on the 3rd floor, so I walk up 70 stairs to get to my floor.
There are actually 4 flights of stairs between 2 and 3 and all upper floors, there is access to a maintenance half-floor, so the stairs are a pretty tight spiral to the right. They make me nauseous. I have to walk on the outside of the spiral, and keep my eyes on the wall.
In the other building I work in, there are 24 stairs between 1 and 2, 25 between 2 and 3, and 26 between 3 and 4. I work on 4th floor, so I walk up 75 stairs to get to my floor. This is a single turn to the left, with 1 landing. I can walk up and down these stairs, and never get dizzy or nauseous.