| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] several years | 731 |
|
| 2 | [prep] several years | 731 |
|
| 3 | for several years | 527 |
|
| 4 | for several years | 527 |
|
| 5 | of several years | 52 |
|
| 6 | of several years | 52 |
|
| 7 | after several years | 51 |
|
| 8 | after several years | 51 |
|
| 9 | over several years | 45 |
|
| 10 | over several years | 45 |
|
| 11 | by several years | 12 |
|
| 12 | in several years | 12 |
|
| 13 | by several years | 12 |
|
| 14 | in several years | 12 |
|
| 15 | to several years | 8 |
|
| 16 | to several years | 8 |
|
| 17 | until several years | 7 |
|
| 18 | until several years | 7 |
|
| 19 | with several years | 7 |
|
| 20 | with several years | 7 |
|
