0 the greatest length of time someone is allowed to spend doing something -- plazo
1 the maximum time allowed for sth -- límite de tiempo [ masculine, singular ]
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Podemos completarlo paso a paso, por muy largo que sea el camino, y no se puede completar, por corto que sea el camino, si ni siquiera marcas tu huella.