The Collaborative International Dictionary
Recurrency
Recurrence \Re*cur"rence\ (r?*k?r"rens), Recurrency \Re*cur"ren*cy\ (-ren*s?), n. [Cf. F. r['e]currence.] The act of recurring, or state of being recurrent; return; resort; recourse.
I shall insensibly go on from a rare to a frequent
recurrence to the dangerous preparations.
--I. Taylor.
Wiktionary
recurrency
n. The act of recurring; recurrence