We can describe the linear arrangement as a line that has two endpoints of Q and R with the days in between.
How to describe the linear arrangement
The linear representation conveys the temporal order of the inspections, which indicates that Q is inspected first, followed by a gap of two days, and then R is inspected. The arrangement captures the relative timing and spacing of the inspections along a linear timeline.
This description also implies a sequence or order of events over time. We can represent the days as positions along a line. The linear arrangement has been represented in the diagram below.