| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] be operated [prep] | 15 |
|
| 2 | [verb] been operated [prep] | 13 |
|
| 3 | have be operated [prep] | 13 |
|
| 4 | [verb] be operated by | 6 |
|
| 5 | [verb] be operated by | 6 |
|
| 6 | had be operated [prep] | 5 |
|
| 7 | [vb base] be operated [prep] | 5 |
|
| 8 | have be operated [prep] | 5 |
|
| 9 | [vb past] be operated [prep] | 5 |
|
