| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years [unc] | 817 |
|
| 2 | [prep] four [noun] [unc] | 96 |
|
| 3 | [prep] four [noun pl] [unc] | 87 |
|
| 4 | [prep] four year [unc] | 52 |
|
| 5 | [prep] four years [unc] | 48 |
|
