| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] once a | 29 |
|
| 2 | [be] [prep] once a | 29 |
|
| 3 | is [prep] once a | 16 |
|
| 4 | [is] [prep] once a | 16 |
|
| 5 | [adj] [prep] once a | 15 |
|
| 6 | [noun] [prep] once a | 14 |
|
| 7 | [verb] [prep] once a | 14 |
|
| 8 | all [prep] once a | 12 |
|
| 9 | all [prep] once a | 12 |
|
| 10 | [det] [prep] once a | 12 |
|
| 11 | [noun sg] [prep] once a | 11 |
|
| 12 | [adv] [prep] once a | 11 |
|
| 13 | [adv] [prep] once a | 8 |
|
| 14 | [was/were] [prep] once a | 7 |
|
| 15 | was [prep] once a | 6 |
|
| 16 | almost [prep] once a | 6 |
|
| 17 | almost [prep] once a | 6 |
|
| 18 | [conj] [prep] once a | 5 |
|
| 19 | [prep] [adv] once a | 124 |
|
| 20 | [prep] [adv] once a | 124 |
|
| 21 | [prep] least once a | 118 |
|
| 22 | [prep] least once a | 118 |
|
| 23 | [prep] [noun] once a | 40 |
|
| 24 | [prep] [noun sg] once a | 23 |
|
| 25 | [prep] [noun prp] once a | 13 |
|
| 26 | [prep] [pron] once a | 9 |
|
| 27 | [prep] [pers pn] once a | 7 |
|
| 28 | [prep] [art] once a | 6 |
|
| 29 | [prep] [art] once a | 6 |
|
| 30 | [prep] once [prep] a | 63 |
|
