| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] about 20 | 71 |
|
| 2 | [noun sg] [prep] about 20 | 50 |
|
| 3 | [verb] [prep] about 20 | 38 |
|
| 4 | [noun pl] [prep] about 20 | 14 |
|
| 5 | [adv] [prep] about 20 | 14 |
|
| 6 | [vb pp] [prep] about 20 | 12 |
|
| 7 | [vb base] [prep] about 20 | 8 |
|
| 8 | [adv prt] [prep] about 20 | 8 |
|
| 9 | [vb past] [prep] about 20 | 7 |
|
| 10 | [adv] [prep] about 20 | 6 |
|
| 11 | [adj] [prep] about 20 | 6 |
|
| 12 | down [prep] about 20 | 5 |
|
| 13 | down [prep] about 20 | 5 |
|
| 14 | group [prep] about 20 | 5 |
|
| 15 | group [prep] about 20 | 5 |
|
| 16 | [prep] [noun] about 20 | 7 |
|
| 17 | [prep] about 20 [noun] | 89 |
|
| 18 | [prep] about 20 [noun pl] | 69 |
|
| 19 | [prep] about 20 [unc] | 28 |
|
| 20 | [prep] about 20 [no cls] | 28 |
|
| 21 | [prep] about 20 per | 27 |
|
| 22 | [prep] about 20 per | 27 |
|
| 23 | [prep] about 20 minute | 22 |
|
| 24 | [prep] about 20 minutes | 22 |
|
| 25 | [prep] about 20 year | 15 |
|
| 26 | [prep] about 20 years | 15 |
|
| 27 | [prep] about 20 [n mass] | 13 |
|
| 28 | [prep] about 20 [adj] | 11 |
|
| 29 | [prep] about 20 [prep] | 7 |
|
| 30 | [prep] about 20 [prep] | 7 |
|
