| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be well known [that] | 130 |
|
| 2 | it be well known that | 130 |
|
| 3 | it is well known [that] | 109 |
|
| 4 | it was well known [that] | 16 |
|
| 5 | it 's well known [that] | 5 |
|
