| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] eight years | 36 |
|
| 2 | for [adv] eight years | 23 |
|
| 3 | for [adv] eight years | 23 |
|
| 4 | [prep] nearly eight years | 8 |
|
| 5 | [prep] over eight years | 7 |
|
| 6 | at [adv] eight years | 7 |
|
| 7 | [prep] least eight years | 7 |
|
| 8 | at [adv] eight years | 7 |
|
| 9 | [prep] about eight years | 6 |
|
