| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [noun sg] [prep] a | 82979 |
|
| 2 | [noun sg] once [prep] a | 29 |
|
| 3 | the [noun sg] once a | 26 |
|
| 4 | the [noun sg] once [prep] | 22 |
|
