docs(README): 📖 use varied descending Interval example

[albertms10]

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[coveralls]

Pull Request Test Coverage Report for Build 7249129728

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• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 7236737306:	0.0%
Covered Lines:	977
Relevant Lines:	977

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💛 - Coveralls