| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [prep] three years ['s] [noun] | 25 |
|
| 2 | [be] [prep] three year ['s] [noun sg] | 25 |
|
| 3 | be [prep] three year ['s] [noun] | 25 |
|
| 4 | [be] [prep] three year ' [noun] | 25 |
|
| 5 | [be] of three year ['s] [noun] | 24 |
|
| 6 | is [prep] three year ['s] [noun] | 24 |
|
| 7 | [be] [prep] three year ['s] duration | 24 |
|
| 8 | [be] [prep] three year ['s] duration | 24 |
|
| 9 | [is] [prep] three year ['s] [noun] | 24 |
|
