| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] at a time | 116 |
|
| 2 | [adv] at a time | 116 |
|
| 3 | little at a time | 32 |
|
| 4 | especially at a time | 13 |
|
| 5 | even at a time | 10 |
|
| 6 | particularly at a time | 9 |
|
| 7 | so at a time | 6 |
|
