Source : Webster's Revised Unabridged Dictionary (1913)

Soakage \Soak"age\, n.
   The act of soaking, or the state of being soaked; also, the
   quantity that enters or issues by soaking.

Source : WordNet®

soakage
     n : 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}, {soaking}]