# File lib/rufus/scheduler/cronline.rb, line 246
    def frequency

      return brute_frequency unless @seconds && @seconds.length > 1

      secs = toa(@seconds)

      secs[1..-1].inject([ secs[0], 60 ]) { |(prev, delta), sec|
        d = sec - prev
        [ sec, d < delta ? d : delta ]
      }[1]
    end