| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years [pron] | 925 |
|
| 2 | [prep] several [noun] [pron] | 227 |
|
| 3 | [prep] [det] years [pron] | 212 |
|
| 4 | [prep] several [noun pl] [pron] | 211 |
|
| 5 | [prep] several years [pron] | 31 |
|
| 6 | [prep] several years [pron] | 31 |
|
| 7 | [prep] several year [pron] | 31 |
|
