The comparison to a keeper in football is close, but in hockey it's a far more important and specialized role. In the NHL, a typical # of shots on goal is 30-35 [1]. Seems like 3-7 is a typical number of saves a football keeper would have to make [2].

Also, the equipment a hockey goalie uses is specialized, whereas I think the only extra equipment a keeper has is a different coloured jersey and gloves.

[1] http://www.nhl.com/stats/team?reportType=season&seasonFrom=2...

[2] http://www.footcharts.co.uk/index.cfm?task=basics_shotsontar...