For example if Vasher instead of tying a knot when kidnapping Vivenna, had given a 'hold things' command to the rope keeping her wrists secured. Could she then have escaped like she did?
Cause you can't retrieve someone elses breath, but can you overwrite it?
Also, for how long would a command be active? Would a rope hold something for eons (disregarding it would disintegrate with time) or would it weaken with time?
Edit: I guess it would stay active with time, considering Nightblood has been around for a while