| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [noun sg] [prep] a time | 9 |
|
| 2 | to [noun sg] [prep] a time | 9 |
|
| 3 | to [noun sg] [prep] a time | 9 |
|
| 4 | to [noun sg] at a time | 7 |
|
| 5 | to [noun sg] at a time | 7 |
|
