| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a | 310452 |
|
| 2 | [noun sg] [prep] a | 232867 |
|
| 3 | opportunity [prep] [art] | 486 |
|
| 4 | opportunity [prep] [art] | 486 |
|
| 5 | opportunity [prep] a | 211 |
|
| 6 | opportunity [prep] a | 180 |
|
