| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is not unknown for | 14 |
|
| 2 | [coord] it is not unknown for | 9 |
|
| 3 | and it is not unknown for | 5 |
|
| 4 | and it is not unknown for | 5 |
|
| 5 | it is not unknown for [art] | 12 |
|
| 6 | it is not unknown for [art] | 12 |
|
| 7 | it is not unknown for [noun] | 11 |
|
| 8 | it is not unknown for [noun pl] | 8 |
|
| 9 | it is not unknown for a | 8 |
|
| 10 | it is not unknown for [adj] | 6 |
|
| 11 | it is not unknown for a | 6 |
|
| 12 | it is not unknown for [pers pn] | 5 |
|
| 13 | it is not unknown for [pron] | 5 |
|
