| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a [noun sg] [noun] | 7141 |
|
| 2 | [not/n't] a [noun sg] [noun] | 919 |
|
| 3 | not a [noun sg] [noun] | 918 |
|
| 4 | n't [art] [noun sg] [noun] | 211 |
|
| 5 | n't a [noun] [noun] | 169 |
|
