accessing
timeSpansOf: integerDivisions

	| borders response |
	borders := integerDivisions 
		periodsSince: self oldest created 
		until: self newest created.
	response := OrderedCollection new.
	1 to: integerDivisions do: [ :i |
		response add: ((borders at: i) asDateAndTime to: (borders at: i + 1) asDateAndTime)
	].
	^ response.