| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] at a time | 218 |
|
| 2 | one at a [noun sg] | 199 |
|
| 3 | one at a [noun] | 199 |
|
| 4 | one at [art] time | 194 |
|
| 5 | one [prep] a time | 191 |
|
| 6 | one at a time | 190 |
|
