| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have had to wait | 13 |
|
| 2 | have had to wait | 12 |
|
| 3 | had had to wait | 10 |
|
| 4 | has had to wait | 6 |
|
| 5 | 've had to wait | 5 |
|
