| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] on [art] extra [noun sg] | 17 |
|
| 2 | [verb] on [art] extra [noun sg] | 17 |
|
| 3 | [verb] on an extra [noun sg] | 13 |
|
| 4 | [verb] on a extra [noun sg] | 13 |
|
