| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] over 20 years | 61 |
|
| 2 | [prep] over 20 years | 61 |
|
| 3 | for over 20 years | 49 |
|
| 4 | for over 20 years | 49 |
|
| 5 | [verb] over 20 years | 16 |
|
| 6 | [noun] over 20 years | 16 |
|
| 7 | [vb pp] over 20 years | 10 |
|
| 8 | [noun sg] over 20 years | 10 |
|
| 9 | [adv] over 20 years | 8 |
|
| 10 | [adj] over 20 years | 8 |
|
| 11 | with over 20 years | 7 |
|
| 12 | with over 20 years | 7 |
|
| 13 | [noun pl] over 20 years | 6 |
|
| 14 | [adv prt] over 20 years | 6 |
|
| 15 | over 20 years [adv] | 16 |
|
| 16 | over 20 years [adv] | 15 |
|
| 17 | over 20 years [prep] | 14 |
|
| 18 | over 20 years [prep] | 14 |
|
| 19 | over 20 years [conj] | 12 |
|
| 20 | over 20 years ago | 11 |
|
| 21 | over 20 years ago | 11 |
|
| 22 | over 20 years [coord] | 10 |
|
| 23 | over 20 years [verb] | 9 |
|
| 24 | over 20 years and | 8 |
|
| 25 | over 20 years and | 8 |
|
| 26 | over 20 years [noun] | 7 |
|
| 27 | over 20 years [unc] | 5 |
|
| 28 | over 20 years [noun sg] | 5 |
|
| 29 | over 20 years ' | 5 |
|
| 30 | over 20 years ' | 5 |
|
