| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] at a certain time | 9 |
|
| 2 | [adv] at a certain time | 7 |
|
| 3 | [noun sg] at a certain time | 7 |
|
| 4 | [verb] at a certain time | 6 |
|
| 5 | [adv prt] at a certain time | 6 |
|
| 6 | at a certain time and | 6 |
|
| 7 | at a certain time [conj] | 6 |
|
| 8 | at a certain time and | 6 |
|
| 9 | at a certain time [coord] | 6 |
|
| 10 | at a certain time [pron] | 5 |
|
