| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [is] [adv] | 8968 |
|
| 2 | which [is] [adv] | 6752 |
|
| 3 | [pron] [is] often | 1641 |
|
| 4 | which [be] often | 386 |
|
| 5 | which [is] often | 166 |
|
