This is the 987th most frequent Finnish word.
aikataulusta
"From the schedule" or "about the schedule."
The word 'aikataulusta' is used to denote comparison to a pre-determined schedule, showing deviation.
Tämä bussi on myöhässä aikataulusta.
This bus is late according to the schedule.
Here 'aikataulusta' is in the elative case, implying something being or moving out from the context of a schedule.
Hänen suunnitelmansa eroaa aikataulusta.
His plan differs from the schedule.
In this case, the elative form 'aikataulusta' indicates referencing or extracting information regarding the schedule.