| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [noun sg] on [adj] | 637 |
|
| 2 | keep an [noun sg] on | 476 |
|
| 3 | keep an [noun sg] [adj] | 34 |
|
| 4 | keep [noun sg] on [adj] | 10 |
|
