| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been established [prep] [det] [noun pl] | 13 |
|
| 2 | have been established [prep] [det] [noun pl] | 6 |
|
| 3 | [vb -s] been established [prep] [det] [noun pl] | 6 |
|
| 4 | [vb base] been established [prep] [det] [noun pl] | 6 |
|
| 5 | [verb] been established for [det] [noun pl] | 6 |
|
| 6 | has been established [prep] [det] [noun pl] | 5 |
|
| 7 | [verb] been established [prep] many [noun pl] | 5 |
|
| 8 | [verb] been established [prep] [det] years | 5 |
|
