| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [art] time [was/were] | 154 |
|
| 2 | at the time [was/were] | 132 |
|
| 3 | at [art] time was | 121 |
|
| 4 | at [art] time were | 34 |
|
| 5 | at no time [was/were] | 17 |
|
| 6 | at a time [was/were] | 6 |
|
