| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [adj] four years | 12 |
|
| 2 | [noun sg] [prep] [adj] four years | 10 |
|
| 3 | [noun] [prep] [num] four years | 6 |
|
| 4 | [noun] [prep] [det] four years | 6 |
|
| 5 | [noun] for [adj] four years | 5 |
|
| 6 | [noun] for [adj] four years | 5 |
|
