on many occasions, or in many situationsOften, students with family problems have difficulties at school.
Boredom often leads to bad behavior.
The home is often the most likely place in which someone is injured.
fairly/quite often: I’ve found that it’s quite often impossible to park near the mall entrance.
often enough (=on enough occasions to achieve a particular result): I’ve already told you not to argue often enough.
very often: Very often it turns out that the student hasn’t understood the question.