| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] eight years | 300 |
|
| 2 | [vb past] [prep] eight | 112 |
|
| 3 | [vb past] [prep] years | 56 |
|
| 4 | [vb past] eight years | 32 |
|
