| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] at a [adj] time | 129 |
|
| 2 | [noun sg] at a [adj] time | 110 |
|
| 3 | [noun sg] at a certain [noun] | 35 |
|
| 4 | [noun sg] at a certain [noun sg] | 34 |
|
| 5 | [noun sg] [prep] a certain time | 17 |
|
| 6 | [noun sg] [prep] a certain time | 17 |
|
| 7 | [noun] at a certain time | 9 |
|
| 8 | [noun sg] at a certain time | 7 |
|
| 9 | [noun sg] at [art] certain time | 7 |
|
| 10 | [noun sg] at a certain time | 7 |
|
| 11 | [noun sg] at a certain time | 7 |
|
