English
flowtime
From flow + time.
Proto-Germanic *flōaną ‘to flow’
Proto-West Germanic *flōan ‘to flow’
Old English flōwan ‘to flow’
Middle English flowen
Middle English flowe
English flow
Proto-Indo-European *deh₂y- ‘to divide’
…
Proto-Germanic *tīmô ‘division, period; time’
Proto-West Germanic *tīmō
Old English tīma ‘time, period’
Middle English tyme
English time
Today it means
noun The time taken for completion of a flow of material (in an experiment).
Language periods are conventional ranges, not dates for this word.
Etymograph / flowtime