| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [prep] [noun] for | 534 |
|
| 2 | [been] [prep] [noun sg] for | 408 |
|
| 3 | [been] [prep] operation [prep] | 44 |
|
| 4 | [be] [prep] operation for | 25 |
|
| 5 | [been] [prep] operation for | 23 |
|
| 6 | [been] [prep] operation for | 23 |
|
