| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have often | 527 |
|
| 2 | has often | 491 |
|
| 3 | had often | 237 |
|
| 4 | 've often | 106 |
|
| 5 | 'd often | 19 |
|
| 6 | 's often | 7 |
|
