| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [verb] several | 39 |
|
| 2 | it [vb mod] [verb] year | 23 |
|
| 3 | [vb mod] [verb] several year | 19 |
|
| 4 | it [verb] several year | 6 |
|
