| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [vb pp] | 5821 |
|
| 2 | it [is] [adv] [vb pp] | 4657 |
|
| 3 | [pron] [is] often [vb pp] | 576 |
|
| 4 | it [be] often [vb pp] | 434 |
|
| 5 | it [is] often [verb] | 386 |
|
| 6 | it [is] often [vb pp] | 383 |
|
