| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at times [adv] | 172 |
|
| 2 | at [noun] when | 172 |
|
| 3 | [prep] times when | 115 |
|
| 4 | [prep] times when | 115 |
|
| 5 | at [noun pl] when | 87 |
|
| 6 | at time when | 75 |
|
| 7 | at times when | 72 |
|
