Question

frequency expressions
siempre always
nunca never
a veces sometimes
what spanish word means something that occurs the least frequently?
nunca
a veces
siempre

Explanation:

"nunca" means "never", indicating zero - frequency. "a veces" means "sometimes", indicating an occasional occurrence. "siempre" means "always", indicating 100% frequency. So "nunca" represents the least frequent occurrence.

Answer:

nunca