| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] [prep] [det] | 200 |
|
| 2 | [vb past] [prep] [det] year | 153 |
|
| 3 | [been] [prep] [det] year | 41 |
|
| 4 | [vb past] [been] [prep] year | 8 |
|
