| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [coord] [prep] a time | 21 |
|
| 2 | [noun sg] and [prep] a time | 19 |
|
| 3 | [noun sg] and [prep] a time | 19 |
|
| 4 | [noun sg] [conj] for a time | 12 |
|
| 5 | [noun sg] [conj] at a time | 9 |
|
