| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] [prep] a two year [noun sg] | 6 |
|
| 2 | [noun prp] [prep] a [num] year period | 5 |
|
| 3 | [noun prp] on a [num] year [noun sg] | 5 |
|
