| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but when [pron] | 2635 |
|
| 2 | but [pron] [conj] | 532 |
|
| 3 | when [pron] [conj] | 398 |
|
| 4 | but when [conj] | 7 |
|
