persistence

Short definition from Wiktionary

Noun

1. 1
   The property of being persistent.
2. 2
   Of data, the property of continuing to exist after the termination of the program.
3. 3
   Continuation of the previous day's weather (particularly temperature and precipitation statistics).
4. 4
   The number of times an operation can be iteratively applied to a number before it reaches a permanently constant state.