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