The rule says; each is used only when the number in the group is limited and definite; every when the number is indefinite. Then I see an example with some other examples; 'leap year falls in every fourth year.'
According to the rule it should be 'each fourth year' as the number of years are limited and definite. Why is it 'every'? Please explain if I misunderstood the rule or the sentence.
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sundarnazWhy is it 'every'?
It's "every four years forever", so it isn't as limited as you may think.
Regardless of what the rule suggests to you, we always use 'every' when expressing rates, especially answers to the question "How often?"
every 10 years / every 20 minutes / every third person in the line / every fifth house on this st