| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb -s] [prep] | 6868 |
|
| 2 | system which [vb -s] | 354 |
|
| 3 | system [vb -s] [prep] | 326 |
|
| 4 | system which [prep] | 12 |
|
