| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it is [adv] often | 10 |
|
| 2 | but it is [adv] often | 7 |
|
| 3 | but it is often [verb] | 10 |
|
| 4 | but it is often [vb pp] | 10 |
|
| 5 | but it is often [adj] | 10 |
|
| 6 | but it is often [adj] | 9 |
|
