| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [prep] a [noun sg] | 1645 |
|
| 2 | [not/n't] [prep] a [noun sg] | 1292 |
|
| 3 | but [not/n't] [prep] [noun sg] | 236 |
|
| 4 | but [not/n't] [prep] a | 151 |
|
| 5 | but [not/n't] a [noun sg] | 129 |
|
