| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [adv] [verb] | 2642 |
|
| 2 | it [verb] [adv] [vb pp] | 1979 |
|
| 3 | it [verb] [adv] occurred | 101 |
|
| 4 | [pron] [verb] [adv] occurred | 75 |
|
| 5 | it [verb] [adv] occur | 57 |
|
