| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | course be [prep] [num] years ' | 48 |
|
| 2 | [noun] be [prep] [num] years ' | 48 |
|
| 3 | [noun] be [prep] [num] years ' | 48 |
|
| 4 | [noun] be of [num] years ' | 47 |
|
| 5 | [noun] be of [num] years ' | 47 |
|
| 6 | [noun] is [prep] [num] years ' | 45 |
|
| 7 | [noun sg] be [prep] [num] years ' | 45 |
|
| 8 | course be [prep] [num] years ' | 45 |
|
| 9 | [noun] be [prep] three years ' | 24 |
|
| 10 | [noun] be [prep] four years ' | 18 |
|
| 11 | [noun] be [prep] two years ' | 6 |
|
