But I have always described it, Job waiting in Queue during the sample frequency.

Or in other words, Jobs waiting for their turn in the scheduling.

Sort of like Left turn lanes in the USA (Right turn lanes in places that drive on the wrong side of the road).

At busy intersections, left turn lanes typically build up a queue of cars to turn left. Most of the time only 3-5 get through per light. Sometimes takes 5 or 6 light cycles to get through it.