| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] of the ozone [noun] over | 7 |
|
| 2 | [noun] of the ozone [noun] over | 7 |
|
| 3 | depletion of the ozone [noun] over | 5 |
|
| 4 | depletion of the ozone [noun] over | 5 |
|
| 5 | of the ozone [noun] over [art] | 5 |
|
| 6 | of the ozone [noun] over the | 5 |
|
| 7 | of the ozone [noun] over the | 5 |
|
| 8 | of the ozone [noun] over [art] | 5 |
|
