The Collaborative International Dictionary of English v.0.48:
Intermittence \In`ter*mit"tence\, n. [Cf. F. intermittence.] Act or state of intermitting; intermission. --Tyndall. [1913 Webster]WordNet (r) 3.0 (2006):
intermittence n 1: the quality of being intermittent; subject to interruption or periodic stopping [syn: intermittence, intermittency]