| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [adv] a | 2910 |
|
| 2 | [adv] perhaps a | 50 |
|
| 3 | not perhaps [art] | 19 |
|
| 4 | not perhaps a | 6 |
|
| 5 | [not/n't] perhaps a | 6 |
|
