| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] a [adj] | 5930 |
|
| 2 | a [adj] problem | 1990 |
|
| 3 | [not/n't] a problem | 238 |
|
| 4 | [not/n't] [adj] problem | 31 |
|
