| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [conj] not a | 85 |
|
| 2 | [adj] but [adv] a | 71 |
|
| 3 | [adj] but not [art] | 46 |
|
| 4 | [adj] but [not/n't] a | 21 |
|
| 5 | [adj] but not a | 21 |
|
