| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] test | 122 |
|
| 2 | a drugs [verb] | 50 |
|
| 3 | a [noun pl] test | 21 |
|
| 4 | [art] drugs test | 14 |
|
| 5 | a drug test | 14 |
|
