| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [indef pn] at [art] time | 9 |
|
| 2 | [adv prt] one at [art] time | 9 |
|
| 3 | [adv prt] [indef pn] at a time | 9 |
|
