| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after [num] year ' [noun] | 87 |
|
| 2 | [prep] [num] year ' service | 64 |
|
| 3 | [prep] [num] year ' service | 64 |
|
| 4 | after [adj] year ' service | 42 |
|
| 5 | after [num] year [unc] service | 42 |
|
| 6 | after [num] year ' service | 41 |
|
| 7 | after [num] [noun] ' service | 41 |
|
