| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | fail a [noun] | 82 |
|
| 2 | [verb] a drugs | 32 |
|
| 3 | fail a drug | 16 |
|
| 4 | fail a [noun pl] | 14 |
|
| 5 | fail [art] drugs | 13 |
|
