| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | important at [art] time | 13 |
|
| 2 | important at the time | 8 |
|
| 3 | important at the time | 8 |
|
| 4 | important at a time | 5 |
|
| 5 | important at a time | 5 |
|
