| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] on [prep] several | 7 |
|
| 2 | [noun sg] [verb] on [prep] several | 5 |
|
| 3 | [verb] on [prep] several [noun pl] | 20 |
|
| 4 | [verb] on [prep] several [noun] | 20 |
|
| 5 | [verb] on [prep] several year | 5 |
|
| 6 | [verb] on [prep] several years | 5 |
|
