Dune jumps in time basically once, between book 3 and 4, from Children to God Emperor. 1-3 is set in Paul's time, 4-6 is set 4000 years later, but within a few years. (We don't talk about 7-8.)

No, Dune is not like Silmarillion or Foundation, they both jump times more regularly, with things and episodes happening in those times.