| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] been known for | 37 |
|
| 2 | it [verb] [been] known for | 37 |
|
| 3 | it have [been] known for | 37 |
|
| 4 | it [vb -s] [been] known for | 31 |
|
| 5 | it has [been] known for | 29 |
|
| 6 | it had [been] known for | 6 |
|
| 7 | it [vb past] [been] known for | 6 |
|
