This is the 369th most frequent Norwegian word.
fleste
"Fleste" means "most" in English.
"Fleste" is used here as a quantifier to indicate the majority of the noun "menneskene" (the people).
De fleste menneskene liker å reise.
Most people like to travel.
"Flest" is used as the superlative form to indicate the highest quantity of the noun "eksemplarer" (copies).
Den nyeste boken i serien solgte flest eksemplarer.
The newest book in the series sold the most copies.
"Flest" is used here in a general description comparing quantities of "blomster" (flowers) across seasons.