1 Nephi 12:21

And I saw them gathered together in multitudes;

and I saw wars and rumors of wars among them;

and in wars and rumors of wars I saw many generations pass away.

and in wars and rumors of wars I saw many generations pass away.

many - 33 occurrences in 24 verses - 1 Nephi 10:3, 15,   11:24,   12:1, 3, 4, 12, 21,   13:1, 2, 7, 10, 12, 13, 14, 23, 26, 28, 29, 35,   14:11, 12, 21, 24

many generations pass away - 2 occurrences in 2 verses - 1 Nephi 12:3, 21