The Collaborative International Dictionary of English v.0.48:

Recency \Re"cen*cy\ (r[=e]"sen*s[y^]), n. [LL. recentia, fr. L.
   recens. See Recent.]
   The state or quality of being recent; newness; new state;
   late origin; lateness in time; freshness; as, the recency of
   a transaction, of a wound, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

recency
    n 1: a time immediately before the present [syn: recency,
         recentness]
    2: the property of having happened or appeared not long ago
       [syn: recency, recentness]