| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [art] time i | 171 |
|
| 2 | at [art] time i | 171 |
|
| 3 | at [art] time i | 170 |
|
| 4 | at the time i | 164 |
|
| 5 | at a time i | 7 |
|
