| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been in operation [prep] [adj] | 29 |
|
| 2 | been in [noun] [prep] some | 29 |
|
| 3 | been in operation [prep] [det] | 8 |
|
| 4 | [been] in operation [prep] some | 5 |
|
| 5 | been in operation [prep] some | 5 |
|
| 6 | be in operation [prep] some | 5 |
|
| 7 | been [prep] operation [prep] some | 5 |
|
| 8 | [be] in operation [prep] some | 5 |
|
| 9 | been in operation [prep] some | 5 |
|
