| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [adv] [adv] [conj] | 466 |
|
| 2 | but [adv] [adv] [conj] | 450 |
|
| 3 | [conj] [adv] often [conj] | 112 |
|
| 4 | but [adv] often [conj] | 34 |
|
