| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | led to the development | 31 |
|
| 2 | led to the development | 27 |
|
| 3 | lead to the development | 13 |
|
| 4 | leads to the development | 11 |
|
| 5 | leading to the development | 6 |
|
