| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years of [noun sg] | 654 |
|
| 2 | [prep] several [noun] of [noun sg] | 188 |
|
| 3 | [prep] several [noun pl] of [noun sg] | 186 |
|
| 4 | [prep] several years [prep] [noun sg] | 30 |
|
| 5 | [prep] several years of [noun] | 25 |
|
| 6 | [prep] several year of [noun sg] | 22 |
|
| 7 | [prep] several years of [noun sg] | 22 |
|
