| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] ten years [unc] | 53 |
|
| 2 | ten years [unc] time | 31 |
|
| 3 | [prep] ten years time | 22 |
|
| 4 | [prep] years [unc] time | 5 |
|
