| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb -s] [been] [verb] [prep] many | 17 |
|
| 2 | it [vb -s] [been] [vb pp] [prep] many | 16 |
|
| 3 | it [vb -s] [been] know [prep] many | 5 |
|
| 4 | it [vb -s] [been] known [prep] many | 5 |
|
