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He once said, “With any considerable number of repetitions, a suitable distribution of them over a space of time is decidedly more advantageous than the massing of them at a single time.”
Example, when you read a book and really enjoy it, instead of putting it away, re-read it again after a month, then again after three months, then again after six months, and then again after a year.
Another example of a mental model is Opportunity Cost, which is the value of the choice of a best alternative cost while making a decision. This model is …