class ActiveSupport::Duration

def build(value)


ActiveSupport::Duration.build(2716146).parts # => {:months=>1, :days=>1}
ActiveSupport::Duration.build(31556952).parts # => {:years=>1}

to the individual parts:
Creates a new Duration from a seconds value that is converted 
def build(value)
  unless value.is_a?(::Numeric)
    raise TypeError, "can't build an #{self.name} from a #{value.class.name}"
  end
  parts = {}
  remainder_sign = value <=> 0
  remainder = value.round(9).abs
  variable = false
  PARTS.each do |part|
    unless part == :seconds
      part_in_seconds = PARTS_IN_SECONDS[part]
      parts[part] = remainder.div(part_in_seconds) * remainder_sign
      remainder %= part_in_seconds
      unless parts[part].zero?
        variable ||= VARIABLE_PARTS.include?(part)
      end
    end
  end unless value == 0
  parts[:seconds] = remainder * remainder_sign
  new(value, parts, variable)
end