What's the difference between frequentest and most?

Frequentest

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Definition:

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Most

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Definition:

• (a.) Consisting of the greatest number or quantity; greater in number or quantity than all the rest; nearly all.
• (a.) Greatest in degree; as, he has the most need of it.
• (a.) Highest in rank; greatest.
• (a.) In the greatest or highest degree.

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