| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] for many years | 68 |
|
| 2 | been [vb pp] for many years | 54 |
|
| 3 | been used for [adj] years | 15 |
|
| 4 | been used for many [noun pl] | 13 |
|
| 5 | been used for many [noun] | 13 |
|
| 6 | been used for [det] years | 13 |
|
| 7 | [be] used for many years | 12 |
|
| 8 | been used [prep] many years | 12 |
|
| 9 | been used [prep] many years | 12 |
|
| 10 | be used for many years | 12 |
|
| 11 | been use for many years | 11 |
|
| 12 | been used for many years | 11 |
|
| 13 | [been] used for many years | 11 |
|
| 14 | been used for many years | 11 |
|
| 15 | been used for many year | 11 |
|
