| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has produced a | 248 |
|
| 2 | have produced a | 132 |
|
| 3 | had produced a | 73 |
|
| 4 | have produced a | 31 |
|
| 5 | having produced a | 9 |
|
| 6 | to have produced a | 8 |
|
| 7 | 've produced a | 7 |
|
