| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] for a [noun sg] | 127 |
|
| 2 | but for a [noun sg] | 126 |
|
| 3 | but [not/n't] a [noun sg] | 122 |
|
| 4 | but [not/n't] for [noun sg] | 24 |
|
| 5 | but [not/n't] for a | 24 |
|
