"Very often" means more often. We would say "very often" if we thought "often" was not enough. See a translation.

How do you use very often?

He did not offend very often, but one never knew when he might not. And very often all I had for supper was brown bread and skim milk. Neither Cleveland nor Harrison, for temperamental reasons, used the magic wire very often. An ill-defined feeling is very often the strongest rule of conduct.

What is the meaning in often?

Often means "frequently," like if you see your friends every day, you see each other often. The adverb often can mean "in great quantities," like you often stop by the donut shop, you might be shocked to realize you've been there hundreds of times in the last few years.