| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [pron] duty | 52 |
|
| 2 | it [pos pn] duty | 52 |
|
| 3 | it his duty | 16 |
|
| 4 | it my duty | 16 |
|
| 5 | it my duty | 16 |
|
| 6 | it his duty | 16 |
|
| 7 | it their duty | 10 |
|
| 8 | it their duty | 10 |
|
