| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [prep] no obligation | 18 |
|
| 2 | [was/were] under no obligation | 18 |
|
| 3 | [was/were] [prep] no obligation | 18 |
|
| 4 | were [prep] no obligation | 9 |
|
| 5 | was [prep] no obligation | 9 |
|
