During translation for 1.11.GA, translators asked for clarification of the expressions "decaying interval" (Chapter 3) and "dimensional data model" (Chapter 1). We updated the wording to make it clearer and more translatable. Those updates should be applied to the English translation as well, particularly "decaying interval", since it connotes a meaning we might not want to convey to end users. (Research was done to investigate whether it is industry standard for metrics. No overwhelming conclusion that this is the case.)