| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] after [num] year ' [noun sg] | 10 |
|
| 2 | [verb] after [num] year ' [noun] | 10 |
|
| 3 | [verb] after [num] year ' service | 8 |
|
| 4 | [verb] after [num] year ' service | 8 |
|
