| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] once [art] [noun] | 31 |
|
| 2 | a [noun] once [art] [noun sg] | 29 |
|
| 3 | a [noun sg] once [art] [noun] | 29 |
|
| 4 | a [noun] once a [noun] | 27 |
|
| 5 | a [noun] once a [noun] | 27 |
|
| 6 | a [noun] once [art] [noun] | 23 |
|
| 7 | a [noun] once [art] week | 16 |
|
| 8 | a [noun] once [art] week | 16 |
|
| 9 | an [noun] once [art] [noun] | 8 |
|
| 10 | a hour once [art] [noun] | 5 |
|
| 11 | a hour once [art] [noun] | 5 |
|
