| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] [noun] at a time | 83 |
|
| 2 | [prep] [art] [noun pl] at [art] time | 66 |
|
| 3 | [prep] [art] [noun pl] at a [noun] | 42 |
|
| 4 | [prep] [art] [noun pl] at a [noun sg] | 40 |
|
| 5 | [prep] [art] [noun pl] [prep] a time | 7 |
|
| 6 | [prep] [art] [noun pl] at a time | 6 |
|
| 7 | [prep] [art] [noun pl] at a time | 6 |
|
