| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] four years | 324 |
|
| 2 | [pos pn] [noun] [prep] four | 121 |
|
| 3 | [pos pn] [noun] [prep] years | 73 |
|
| 4 | [pos pn] [noun] four years | 12 |
|
