| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be kept [prep] a [adj] time | 7 |
|
| 2 | be kept [prep] [art] [adj] time | 7 |
|
| 3 | be kept [prep] a [adj] time | 7 |
|
| 4 | be kept [prep] [art] [adj] time | 7 |
|
| 5 | be kept for [art] [adj] time | 6 |
|
| 6 | be kept for [art] [adj] time | 6 |
|
| 7 | be kept [prep] [art] [adj] time | 5 |
|
| 8 | be kept [prep] [art] long time | 5 |
|
