| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] known at the time | 8 |
|
| 2 | [adv] known at the time | 8 |
|
| 3 | be known at the time | 8 |
|
| 4 | [noun] known at the time | 5 |
|
| 5 | known at the time [prep] | 10 |
|
| 6 | known at the time [prep] | 10 |
|
| 7 | known at the time of | 6 |
|
| 8 | known at the time [conj] | 6 |
|
| 9 | known at the time of | 6 |
|
