What you call shift work is different from the swedish definition of it. Shift work is typically a term reserved for those types of work where there is a briefing between shifts. Industry, hospital etc. 24-hour kind of operations.

What i think you mean is office work, but that could also mean set times. But you would never call it shift work.

Lets say a call center that has a set opening time, or mechanic that has to open the shop at a given time. Those would not be considered shift work, unless they are open 24/7. So thats where we misunderstand each other.