What does biweekly mean whenever it comes to shifts?

I have a job interview for a job and the postion hours are as followed:

Position Schedule: Position hours are 4:00pm-7:30pm, and 6:30am-2:30pm. Working 30 hours biweekly.
Is the biweekly twice a month? And how do they go about pay periods for biweekly shifts?
Update: Can someone tell me how they pay people working this ****?
Update 2: I meant shift. :-)
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