| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] than once a | 32 |
|
| 2 | less than once [art] | 8 |
|
| 3 | less than once [art] | 8 |
|
| 4 | less than [adv] a | 7 |
|
| 5 | less than [adv] a | 7 |
|
| 6 | less than once a | 6 |
|
| 7 | less [subord] once a | 6 |
|
| 8 | less [conj] once a | 6 |
|
| 9 | less than once a | 6 |
|
| 10 | less than once a | 6 |
|
