| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [det] years [adv] | 221 |
|
| 2 | [det] years [adv] when | 75 |
|
| 3 | [prep] [det] [adv] when | 16 |
|
| 4 | [prep] years [adv] when | 14 |
|
