| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [prep] a [noun] in | 12 |
|
| 2 | [adv] [prep] a time in | 12 |
|
| 3 | once [prep] a [noun sg] in | 12 |
|
| 4 | [adv] [prep] a time in | 11 |
|
| 5 | once [prep] a time [prep] | 8 |
|
| 6 | once [prep] a time [prep] | 8 |
|
| 7 | once [prep] a time in | 7 |
|
| 8 | once [prep] a time in | 7 |
|
| 9 | once [prep] [art] time in | 7 |
|
| 10 | once [prep] a time in | 7 |
|
| 11 | once [prep] [art] time in | 7 |
|
| 12 | once [prep] a time in | 7 |
|
