| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] [adj] year | 519 |
|
| 2 | [v-ing] [prep] [num] year | 321 |
|
| 3 | [verb] [prep] twenty year | 68 |
|
| 4 | [v-ing] [prep] twenty [noun] | 31 |
|
| 5 | [v-ing] [prep] twenty year | 13 |
|
