| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] known that | 267 |
|
| 2 | it be known that | 267 |
|
| 3 | it [is] known that | 153 |
|
| 4 | it is known that | 148 |
|
| 5 | it be known that | 61 |
|
| 6 | it [be] known that | 61 |
|
| 7 | it [was/were] known that | 52 |
|
| 8 | it was known that | 49 |
|
| 9 | it 's known that | 5 |
|
