| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep an [adj] [noun sg] on | 22 |
|
| 2 | keep an open [noun sg] on | 15 |
|
| 3 | keep an [adj] mind on | 15 |
|
| 4 | keep an open [noun sg] on | 15 |
|
| 5 | keeping an [adj] [noun sg] on | 9 |
|
| 6 | keep an [adj] eye on | 5 |
|
