No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] has been operating for | 6 |
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2 | [noun] has [be] operating for | 6 |
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3 | [noun] has [been] operating for | 6 |
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4 | [noun] has be operating for | 6 |
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5 | [noun sg] has [be] operating for | 5 |
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