I always use seconds as an allegory to dollars when I explain to people the difference between thousand, million and billion (I did the number crunching in my head and rushed it, so if I made any errors lemme know).
1000 seconds = 17 minutes
100,000 seconds = 27 hours
1 million seconds = 11 days
1 billion seconds = 31.70 years
148 billion seconds (Bezos' net worth) = 4693 years