| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] year ['s] service | 119 |
|
| 2 | [num] year ' service | 113 |
|
| 3 | [num] years ['s] service | 113 |
|
| 4 | 25 year ['s] service | 13 |
|
| 5 | five year ['s] service | 8 |
|
| 6 | ten year ['s] service | 8 |
|
| 7 | two year ['s] service | 8 |
|
| 8 | [num] year ['s] service | 6 |
|
| 9 | 35 year ['s] service | 6 |
|
| 10 | [num] year 's service | 6 |
|
| 11 | 20 year ['s] service | 5 |
|
