| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years of [noun] service | 9 |
|
| 2 | [adj] years of [noun] service | 9 |
|
| 3 | [num] years of [noun] service | 9 |
|
| 4 | [adj] years of [noun sg] service | 8 |
|
