| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] established that [art] | 13 |
|
| 2 | it is well established that [art] | 9 |
|
| 3 | it is [adv] established that the | 8 |
|
| 4 | it is [adv] established that a | 5 |
|
