| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] once a [noun sg] | 336 |
|
| 2 | [noun] once a [noun sg] | 298 |
|
| 3 | [adv] once a [noun sg] | 297 |
|
| 4 | [noun sg] once a [noun sg] | 206 |
|
| 5 | [verb] once a [noun sg] | 190 |
|
| 6 | be once a [noun sg] | 136 |
|
| 7 | [be] once a [noun sg] | 136 |
|
| 8 | [was/were] once a [noun sg] | 123 |
|
| 9 | [conj] once a [noun sg] | 120 |
|
| 10 | least once a [noun sg] | 118 |
|
| 11 | least once a [noun sg] | 118 |
|
| 12 | was once a [noun sg] | 112 |
|
| 13 | [prep] once a [noun sg] | 64 |
|
| 14 | [prep] once a [noun sg] | 64 |
|
| 15 | [pron] once a [noun sg] | 63 |
|
| 16 | [noun pl] once a [noun sg] | 62 |
|
| 17 | [vb pp] once a [noun sg] | 60 |
|
| 18 | [pers pn] once a [noun sg] | 54 |
|
| 19 | [coord] once a [noun sg] | 53 |
|
| 20 | only once a [noun sg] | 52 |
|
| 21 | only once a [noun sg] | 52 |
|
| 22 | [subord] once a [noun sg] | 44 |
|
| 23 | about once a [noun sg] | 40 |
|
| 24 | about once a [noun sg] | 40 |
|
| 25 | at once a [noun sg] | 36 |
|
| 26 | [vb base] once a [noun sg] | 36 |
|
| 27 | at once a [noun sg] | 36 |
|
| 28 | [adv prt] once a [noun sg] | 34 |
|
| 29 | than once a [noun sg] | 30 |
|
| 30 | than once a [noun sg] | 30 |
|
