| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has become a | 720 |
|
| 2 | had become a | 552 |
|
| 3 | have become a | 108 |
|
| 4 | have become a | 47 |
|
| 5 | to have become a | 27 |
|
| 6 | having become a | 15 |
|
| 7 | 've become a | 11 |
|
| 8 | 's become a | 9 |
|
