No | Pattern | Freq | Relations |
---|---|---|---|
1 | have been used for | 195 | |
2 | has [been] used for | 62 | |
3 | have [been] used for | 53 | |
4 | had [been] used for | 36 | |
5 | have [been] used for | 23 | |
6 | to have [been] used for | 10 | |
7 | 's [been] used for | 7 |
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