| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have a duty | 129 |
|
| 2 | [noun pl] have a duty | 50 |
|
| 3 | authorities have a [noun] | 26 |
|
| 4 | authority have a duty | 23 |
|
| 5 | authorities have [art] duty | 17 |
|
| 6 | authorities have [art] duty | 17 |
|
| 7 | authorities [verb] a duty | 16 |
|
| 8 | authorities have a duty | 16 |
|
