| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [adj] [noun] on | 2510 |
|
| 2 | keep an [noun] on | 476 |
|
| 3 | keep an [adj] [noun] | 131 |
|
| 4 | keep [adj] [noun] on | 76 |
|
