| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [noun] on [adj] | 645 |
|
| 2 | keep an [noun] on | 476 |
|
| 3 | keep an [noun] [adj] | 34 |
|
| 4 | keep [noun] on [adj] | 22 |
|
