| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been established for [adj] [noun pl] | 10 |
|
| 2 | have [been] established for [det] [noun pl] | 6 |
|
| 3 | has [been] established for [adj] [noun pl] | 6 |
|
| 4 | have [been] established for [adj] years | 5 |
|
