| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [verb] | 5806 |
|
| 2 | it is [adv] [vb pp] | 4715 |
|
| 3 | it [be] [adv] established | 93 |
|
| 4 | it be [adv] established | 93 |
|
| 5 | [pron] is [adv] established | 71 |
|
| 6 | it [is] [adv] established | 68 |
|
| 7 | it is [adv] establish | 64 |
|
