| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [verb] [prep] [det] year | 138 |
|
| 2 | [been] [vb pp] [prep] [det] year | 101 |
|
| 3 | [been] established [prep] [det] [noun] | 20 |
|
| 4 | [been] established [prep] [adj] year | 7 |
|
| 5 | [been] establish [prep] [det] year | 5 |
|
| 6 | [been] established [prep] [det] year | 5 |
|
| 7 | [be] established [prep] [det] year | 5 |
|
