| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] after 15 years | 10 |
|
| 2 | [noun sg] after 15 years | 5 |
|
| 3 | after 15 years [prep] | 14 |
|
| 4 | after 15 years [prep] | 14 |
|
| 5 | after 15 years of | 9 |
|
| 6 | after 15 years of | 9 |
|
