| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been established [prep] [det] | 28 |
|
| 2 | [been] established for [det] | 9 |
|
| 3 | [been] established in [det] | 8 |
|
| 4 | [been] established [prep] some | 7 |
|
| 5 | [been] established [prep] many | 5 |
|
