How Old Is a Soul?

how can we measure how old is our soul? sometimes the level (higher or lower) of the soul is said to be dependent on the very age of the soul, or the enrichment through the experience gained in passed lives? does the ideia of evaluating the soul level through its age have any sense? shouldn't the time factor be irrelevant in the "spiritual world"?

Again I would like to point out the question of whose definition of a soul are we refering too?

i was refering to traditional understanding of soul, as life force living in and out the human body, and as manifestation of the counscience itself. i'm not familirized with "technical" terminology in which concerns to this subject. please, post the concepts if you think it will clarify.