| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a [noun] | 76638 |
|
| 2 | [not/n't] a [noun] | 10824 |
|
| 3 | not a [noun] | 10817 |
|
| 4 | n't [art] [noun] | 3002 |
|
