| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] a [adj] [noun sg] | 4711 |
|
| 2 | but a [adj] [noun sg] | 1858 |
|
| 3 | but [not/n't] a [noun sg] | 122 |
|
| 4 | but [not/n't] [adj] [noun sg] | 119 |
|
| 5 | but [not/n't] a [adj] | 90 |
|
