| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | control [prep] [noun] | 2087 |
|
| 2 | control [prep] [noun sg] | 1175 |
|
| 3 | [noun] [prep] pollution | 634 |
|
| 4 | [noun sg] [prep] pollution | 429 |
|
| 5 | control [prep] pollution | 30 |
|
| 6 | control [prep] pollution | 28 |
|
