| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] been [prep] operation for | 13 |
|
| 2 | [noun sg] [verb] been [prep] operation for | 11 |
|
| 3 | [verb] been [prep] operation for [adj] | 16 |
|
| 4 | [verb] been [prep] operation for [num] | 9 |
|
| 5 | [verb] been [prep] operation for [det] | 7 |
|
| 6 | [verb] been [prep] operation for some | 5 |
|
| 7 | [verb] been [prep] operation for some | 5 |
|
