| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been know [prep] a | 7 |
|
| 2 | it [verb] been known [prep] a | 7 |
|
| 3 | it [verb] been know for a | 6 |
|
| 4 | it [vb -s] been know [prep] a | 6 |
|
| 5 | it has been know [prep] a | 5 |
|
