| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [noun sg] | 175109 |
|
| 2 | a [noun pl] [noun sg] | 3655 |
|
| 3 | a drug [noun sg] | 199 |
|
| 4 | [art] drugs [noun sg] | 148 |
|
| 5 | a drugs [noun] | 46 |
|
