| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adv] [adj] [noun] | 714 |
|
| 2 | at a time [adv] [noun] | 351 |
|
| 3 | a time [adv] [adj] [noun] | 155 |
|
| 4 | at a time [adv] [adj] | 138 |
|
