| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to keep a close [noun sg] [prep] | 18 |
|
| 2 | to keep a close [noun] on | 17 |
|
| 3 | to keep a close eye [prep] | 10 |
|
| 4 | to keep a close eye [prep] | 10 |
|
| 5 | to keep a close watch [prep] | 6 |
|
| 6 | to keep a close watch [prep] | 6 |
|
