| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | speak at the [noun sg] of | 52 |
|
| 2 | speaking at the [noun sg] of | 47 |
|
| 3 | speak at the launch of | 18 |
|
| 4 | speak at the opening of | 9 |
|
| 5 | speak at the end of | 7 |
|
