| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep an [noun] [prep] | 510 |
|
| 2 | [not/n't] an [noun] [prep] | 418 |
|
| 3 | [not/n't] keep [noun] [prep] | 73 |
|
| 4 | [not/n't] keep an [noun] | 9 |
|
