| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | keep [art] | 1338 |
|
| 2 | keep the | 808 |
|
| 3 | keep the | 808 |
|
| 4 | keep a | 527 |
|
| 5 | keep a | 383 |
|
| 6 | keep an | 144 |
|
