| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has long [been] recognised that | 13 |
|
| 2 | it has long [been] recognised that | 13 |
|
| 3 | it has long [been] recognised [that] | 13 |
|
| 4 | it has long [been] recognised [conj] | 13 |
|
