| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty minutes [prep] [adj] [noun] | 10 |
|
| 2 | twenty minutes of [adj] [noun] | 9 |
|
| 3 | twenty minutes of [adj] [noun] | 9 |
|
| 4 | twenty minutes [prep] [adj] [noun sg] | 8 |
|
