| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a drugs | 32 |
|
| 2 | failing a [noun] | 28 |
|
| 3 | [v-ing] a drugs | 14 |
|
| 4 | fail a drugs | 13 |
|
| 5 | failing a drug | 12 |
|
| 6 | failing a [noun pl] | 10 |
|
| 7 | failing [art] drugs | 10 |
|
