| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had written to | 156 |
|
| 2 | has written to | 131 |
|
| 3 | have written to | 84 |
|
| 4 | 've written to | 29 |
|
| 5 | have written to | 9 |
|
| 6 | 'd written to | 6 |
|
| 7 | to have written to | 6 |
|
