This just says deviations counts are dense in the integers.

When the deviation counts are minimum, all equal to one, then there are three equal length paths to count up to the next smallest deviation count. They are uniform deviation counts, each one counting once during each deviation count.
This is really a general statement of the sampling rate criteria. If x,y,z are the result of sampling some function F(s,t,u), then the samplers have to meet Nyquist in total. At the minimum deviation the three samplers must have  sampled at least twice.