| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep a [noun] on | 606 |
|
| 2 | keep a [noun sg] on | 606 |
|
| 3 | [verb] a eye on | 488 |
|
| 4 | keep a eye [prep] | 473 |
|
| 5 | keep a eye on | 472 |
|
| 6 | keep [art] eye on | 472 |
|
