| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] a [adj] time | 209 |
|
| 2 | [verb] at a [adj] time | 136 |
|
| 3 | [modal v] [verb] at a [adj] | 115 |
|
| 4 | [modal v] [verb] at [adj] time | 91 |
|
| 5 | [modal v] [verb] at a time | 9 |
|
