| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] [adj] a year [modal v] | 6 |
|
| 2 | [noun] [adj] a year [vb mod] | 6 |
|
| 3 | [noun] [num] a year [modal v] | 6 |
|
| 4 | [noun] million a year [modal v] | 5 |
|
| 5 | [noun] million a year [modal v] | 5 |
|
