| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] known for some time | 10 |
|
| 2 | has [been] known [prep] some time | 10 |
|
| 3 | has [been] known for some time | 10 |
|
| 4 | has been known [prep] some time | 10 |
|
