| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] at a time | 11 |
|
| 2 | it come at a time | 7 |
|
| 3 | it [vb past] at a time | 6 |
|
| 4 | it [vb -s] at a time | 5 |
|
