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. “Oftenly” is not a standard English word and you should avoid using it.

Understanding the Context

Often means frequently or many times. For example, “She visits her grandmother often.” Using often correctly shows that you know how to use adverbs properly, which is important for clear communication.