| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [adv] [verb] that | 243 |
|
| 2 | is [adv] [adv] [vb pp] that | 180 |
|
| 3 | is [adv] [adv] established [conj] | 14 |
|
| 4 | be [adv] [adv] established that | 11 |
|
| 5 | [be] [adv] [adv] established that | 11 |
|
| 6 | is [adv] [adv] establish that | 10 |
|
| 7 | [is] [adv] [adv] established that | 9 |
|
