| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used for [noun] | 80 |
|
| 2 | [been] used for [noun sg] | 49 |
|
| 3 | [been] used for [noun pl] | 27 |
|
| 4 | [been] used for year | 8 |
|
| 5 | [been] used for years | 8 |
|
