| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] year ['s] service | 129 |
|
| 2 | [num] year ['s] service | 119 |
|
| 3 | [adj] [num] year ['s] | 68 |
|
| 4 | [adj] [num] year service | 8 |
|
