| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] in 15 year | 13 |
|
| 2 | [noun sg] in 15 year | 11 |
|
| 3 | time in 15 year | 7 |
|
| 4 | time in 15 year | 7 |
|
| 5 | in [noun] 15 year | 6 |
|
| 6 | in [noun prp] 15 year | 5 |
|
