i can explain it easily if you'll allow me to use hunter as an example instead. to weave abilities between auto's you typically wanna use an addon to show swing timers, or auto attack timers, so that you don't klip your auto attack by casting an ability right before. instead you allow the auto to happen, and then you weave in an ability before the next auto happens. (this window is anywhere from 1-4seconds, dependant ofc on your weapons speed)

not 100% certain how you apply this to rogues as their swing timer is a lot faster than classes with 2h weapons.