| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] at a time | 104 |
|
| 2 | a [noun] at a time | 104 |
|
| 3 | a week at a time | 11 |
|
| 4 | a bit at a time | 11 |
|
| 5 | a bit at a time | 11 |
|
| 6 | a week at a time | 11 |
|
| 7 | a year at a time | 7 |
|
| 8 | a year at a time | 7 |
|
| 9 | a day at a time | 6 |
|
| 10 | a month at a time | 6 |
|
| 11 | a month at a time | 6 |
|
| 12 | a step at a time | 6 |
|
| 13 | a day at a time | 6 |
|
| 14 | a step at a time | 6 |
|
