| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adv] [adv] established that | 10 |
|
| 2 | it [be] [adv] [adv] established that | 10 |
|
| 3 | it [is] [adv] [adv] established that | 9 |
|
| 4 | it is [adv] [adv] established that | 9 |
|
| 5 | it [be] now [adv] established that | 8 |
|
| 6 | it [be] [adv] well established that | 6 |
|
