| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] [prep] several years | 15 |
|
| 2 | [vb pp] [adv] [prep] several years | 8 |
|
| 3 | [noun] [adv] [prep] several years | 6 |
|
| 4 | [adv] [adv] [prep] several years | 5 |
|
| 5 | [adv] [verb] [prep] several years | 8 |
|
| 6 | [adv] [adj] [prep] several years | 6 |
|
| 7 | [adv] [adj] [prep] several years | 6 |
|
| 8 | [adv] [vb pp] [prep] several years | 6 |
|
| 9 | [adv] [adv] [prep] several years | 5 |
|
| 10 | [adv] [prep] several years [conj] | 8 |
|
| 11 | [adv] [prep] several years and | 7 |
|
| 12 | [adv] [prep] several years [coord] | 7 |
|
| 13 | [adv] [prep] several years and | 7 |
|
