| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [is] [adv] | 8968 |
|
| 2 | which [is] [Wh adv] | 764 |
|
| 3 | which [be] why | 642 |
|
| 4 | [pron] [is] why | 620 |
|
| 5 | which [is] why | 565 |
|
