| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been know for | 37 |
|
| 2 | it have been known for | 37 |
|
| 3 | it have been know for | 37 |
|
| 4 | it has been know for | 29 |
|
| 5 | it had been know for | 6 |
|
