| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | operate on a [adj] [noun sg] | 13 |
|
| 2 | operate on a [adj] [noun] | 12 |
|
| 3 | operate on a [adj] basis | 5 |
|
| 4 | operate on a [adj] basis | 5 |
|
