| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years when | 54 |
|
| 2 | for [num] years [Wh adv] | 23 |
|
| 3 | after [num] years [Wh adv] | 11 |
|
| 4 | [prep] three years [Wh adv] | 10 |
|
| 5 | [prep] five years [Wh adv] | 9 |
|
| 6 | in [num] years [Wh adv] | 8 |
|
| 7 | of [num] years [Wh adv] | 6 |
|
| 8 | [prep] two years [Wh adv] | 6 |
|
| 9 | [prep] four years [Wh adv] | 5 |
|
