| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] of several years ' | 8 |
|
| 2 | [noun sg] of several years ' | 6 |
|
| 3 | of several years ' [noun sg] | 7 |
|
| 4 | of several years ' [noun] | 7 |
|
