| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] once a [noun sg] | 120 |
|
| 2 | [conj] once a [noun] | 116 |
|
| 3 | [coord] once a [noun] | 53 |
|
| 4 | [subord] once a [noun] | 46 |
|
| 5 | than once a [noun] | 31 |
|
| 6 | than once a [noun] | 31 |
|
| 7 | and once a [noun] | 26 |
|
| 8 | and once a [noun] | 26 |
|
| 9 | [conj] once a week | 25 |
|
| 10 | [conj] once a week | 25 |
|
| 11 | that once a [noun] | 23 |
|
| 12 | [that] once a [noun] | 23 |
|
| 13 | that once a [noun] | 23 |
|
| 14 | [conj] once a year | 21 |
|
| 15 | [conj] once a year | 21 |
|
| 16 | [conj] once a month | 19 |
|
| 17 | [conj] once a month | 19 |
|
| 18 | but once a [noun] | 16 |
|
| 19 | but once a [noun] | 16 |
|
| 20 | or once a [noun] | 11 |
|
| 21 | or once a [noun] | 11 |
|
| 22 | where once a [noun] | 6 |
|
| 23 | where once a [noun] | 6 |
|
| 24 | [conj] once an [noun] | 6 |
|
| 25 | [conj] once a person | 5 |
|
| 26 | [conj] once a person | 5 |
|
