| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] years [pron] have | 93 |
|
| 2 | [prep] several years [pron] | 31 |
|
| 3 | several years [pron] have | 10 |
|
| 4 | [prep] several years have | 6 |
|
