| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not a [noun] | 9514 |
|
| 2 | [adv] a problem | 548 |
|
| 3 | not [art] problem | 287 |
|
| 4 | not [art] problem | 287 |
|
| 5 | not a problem | 237 |
|
