| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not be [prep] vain | 10 |
|
| 2 | [not/n't] be in vain | 10 |
|
| 3 | [not/n't] been [prep] vain | 5 |
|
| 4 | [not/n't] be [prep] vain | 5 |
|
