| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be used [prep] the operation | 9 |
|
| 2 | [prep] be used [prep] the operation | 9 |
|
| 3 | to be used [prep] the operation | 9 |
|
| 4 | to be used [prep] the operation | 9 |
|
| 5 | [prep] be used [prep] the operation | 9 |
|
| 6 | [prep] be used for the operation | 8 |
|
