variants
or sub-phase
plural subphases or sub-phases
: a phase that is a part of a longer phase
The task-centered model of helping is usually broken into three phases … . Each phase has distinct subphases or tasks to be accomplished.—
Carol L. Langer and Cynthia Lietz
The ceramic sequence now consists of five phases, spanning the period AD 900-1650 … . All but the last of these phases have been further subdivided into early and late subphases, each about 75-100 years long.—
Vernon J. Knight and Vincas P. Steponaitis
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