This is the 5170th most frequent Polish word.
przyjechało
"(It) arrived" (referring to a vehicle or means of transport).
Here, "przyjechało" is used to describe the completed action of the bus arriving at the stop, indicating motion from one place to another.
Autobus właśnie przyjechało na przystanek.
The bus has just arrived at the stop.
In this sentence, "przyjechało" describes the motion of cars coming to the parking area, referring to movement of vehicles.
Na parking przyjechało kilka samochodów.
Several cars arrived at the parking lot.
Here, "przyjechało" refers to the arrival of people at the festival location, indicating the act of coming to attend.