The Collaborative International Dictionary of English v.0.48:
Soakage \Soak"age\, n. The act of soaking, or the state of being soaked; also, the quantity that enters or issues by soaking. [1913 Webster]WordNet (r) 3.0 (2006):
soakage n 1: the process of becoming softened and saturated as a consequence of being immersed in water (or other liquid); "a good soak put life back in the wagon" [syn: soak, soakage, soaking]