what is the frequency of the service?
Boats leave every 15 to 20 minutes during peak hours and every 30 minutes at other times.
Staten Island Ferry
The ferry operates 24 hours a day, 7 days a week, with boats leaving every 15 to 20 minutes during peak hours and every 30 minutes at other times.
how long does the ferry take from staten island to manhattan 25 minutes
wiki:12090957
Staten Island Ferry [SEP] Introduction
The Staten Island Ferry is a passenger ferry route operated by the New York City Department of Transportation. The ferry's single route runs through New York Harbor between the New York City boroughs of Manhattan and Staten Island, with ferry boats making the trip in approximately 25 minutes. The ferry operates 24 hours a day, 7 days a week, with boats leaving every 15 to 20 minutes during peak hours and every 30 minutes at other times. It is the only direct mass-transit connection between the two boroughs. Historically, the Staten Island Ferry has charged a relatively low fare compared to other modes of transit in the area; and since 1997 the route has been fare-free.