| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [vb pp] [that] [art] | 3101 |
|
| 2 | it [be] often [vb pp] [that] | 163 |
|
| 3 | [be] often [vb pp] [that] [art] | 52 |
|
| 4 | it [be] often [vb pp] [art] | 10 |
|
