From an unused root meaning to extend; properly extent (of time); but used only adverbially (especially with other particles {prefixed}) when (either relative or interrogitive): - {long} when.
From H8505 in the transferred sense of measuring; proportion (in {size} number or ingredients): - {composition} {measure} {state} tale.
Verse
Matrix
Gen 30:30For it was little which thou hadst before I came, and it is now increased unto a multitude; and the LORD hath blessed thee since my coming: and now whenH4970 shall I provide for mine own house also? ▼▼
Exo 8:9And Moses said unto Pharaoh, Glory over me: whenH4970 shall I intreat for thee, and for thy servants, and for thy people, to destroy the frogs from thee and thy houses, that they may remain in the river only? ▼▼▼
Exo 10:3And Moses and Aaron came in unto Pharaoh, and said unto him, Thus saith the LORD God of the Hebrews, How longH4970 wilt thou refuse to humble thyself before me? let my people go, that they may serve me.