| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years [modal v] | 88 |
|
| 2 | [prep] [num] we [modal v] | 52 |
|
| 3 | [prep] [num] years we | 23 |
|
| 4 | [num] years we [modal v] | 22 |
|
