| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years they [vb past] | 11 |
|
| 2 | for [num] years they [vb past] | 7 |
|
| 3 | for [num] years they [vb past] | 7 |
|
| 4 | [prep] [num] years they had | 5 |
|
