received ``recently,'' with the rate of decay inversely proportional to
the number of threads competing for the CPU.
-Assumptions made by some of the tests require that updates to
+Assumptions made by some of the tests require that these recalculations of
@var{recent_cpu} be made exactly when the system tick counter reaches a
multiple of a second, that is, when @code{timer_ticks () % TIMER_FREQ ==
0}, and not at any other time.