time division

Short definition from Wiktionary

Noun

1. 1
   A division of a geological period or extent of geological time.
2. 2
   A time slot allocated to one of multiple users when a common channel (multipoint or broadcast) is shared.
3. 3
   Used other than figuratively or idiomatically: see time, division. The division of time.
4. 4
   Alternative form of time division.