| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be off [noun] | 271 |
|
| 2 | be [prep] duty | 267 |
|
| 3 | be [prep] duty | 267 |
|
| 4 | be off duty | 49 |
|
| 5 | [be] off duty | 49 |
|
