| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb past] [be] [prep] operation | 9 |
|
| 2 | [noun sg] [vb past] [be] [prep] operation | 8 |
|
| 3 | [pron] [vb past] [be] [prep] operation | 5 |
|
| 4 | [vb past] [be] [prep] operation [prep] | 12 |
|
| 5 | [vb past] [be] [prep] operation [prep] | 12 |
|
| 6 | [vb past] [be] [prep] operation since | 5 |
|
| 7 | [vb past] [be] [prep] operation for | 5 |
|
| 8 | [vb past] [be] [prep] operation for | 5 |
|
| 9 | [vb past] [be] [prep] operation since | 5 |
|
