| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have appeared [prep] | 41 |
|
| 2 | which have appeared in | 26 |
|
| 3 | which had appeared [prep] | 18 |
|
| 4 | which have appeared [prep] | 17 |
|
| 5 | which has appeared [prep] | 6 |
|
