| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] once [art] [noun sg] [prep] | 62 |
|
| 2 | [verb] once a [noun sg] [prep] | 48 |
|
| 3 | [verb] once a [noun sg] [prep] | 48 |
|
| 4 | [verb] once [art] week [prep] | 23 |
|
| 5 | [vb pp] once [art] [noun sg] [prep] | 19 |
|
| 6 | [verb] once [art] [noun sg] of | 14 |
|
| 7 | [verb] once [art] [noun sg] for | 13 |
|
| 8 | [verb] once the [noun sg] [prep] | 12 |
|
| 9 | [verb] once the [noun sg] [prep] | 12 |
|
| 10 | [vb base] once [art] [noun sg] [prep] | 12 |
|
| 11 | [vb past] once [art] [noun sg] [prep] | 11 |
|
| 12 | meet once [art] [noun sg] [prep] | 11 |
|
| 13 | [verb] once [art] month [prep] | 10 |
|
| 14 | [verb] once [art] [noun sg] in | 9 |
|
| 15 | [vb -s] once [art] [noun sg] [prep] | 8 |
|
| 16 | [verb] once [art] [noun sg] at | 6 |
|
| 17 | [verb] once [art] year [prep] | 6 |
|
| 18 | [verb] once [art] [noun sg] on | 6 |
|
| 19 | [verb] once [art] [noun sg] to | 5 |
|
| 20 | [to-vb] once [art] [noun sg] [prep] | 5 |
|
