| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a time of | 22 |
|
| 2 | [adv] [prep] a time of | 22 |
|
| 3 | [adv] at a time of | 13 |
|
| 4 | [adv] at a time of | 13 |
|
| 5 | [adv] in a time of | 6 |
|
| 6 | [adv] in a time of | 6 |
|
