recurrence

recurrent +‎ -ence, cognate with Latin recurrentia, from recurrēns (“returning back, recurring”), form of recurrō (“I return, I recur”) (English recur).

recurrence (countable and uncountable, plural recurrences)

1. Return or reversion to a certain state.
2. The instance of recurring; frequent occurrence.
   • I. Taylor

     I shall insensibly go on from a rare to a frequent recurrence to the dangerous preparations.

3. A return of symptoms as part of the natural progress of a disease.
4. Recourse.

• reoccurrence

• recrudescence
• reemergence
• resurgence

• recur
• recurrent
• recursive
• recursivity
• recursion

• “recurrence” in Douglas Harper, Online Etymology Dictionary, 2001–2019.