| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] prison officers ' | 8 |
|
| 2 | [prep] [art] prison officers ' | 8 |
|
| 3 | [art] prison officers ' [noun] | 10 |
|
| 4 | [art] prison officers ' [noun sg] | 10 |
|
| 5 | [art] prison officers ' association | 7 |
|
| 6 | [art] prison officers ' association | 7 |
|
