The phrase "often occurs in" is correct and can be used in written English.
This phrase can be used to indicate a repetition or frequent occurrence of something. For example: "Heavy rain often occurs in the tropics."
Dust or water bathing is common and often occurs in groups.
The question often occurs in India.
Diversifying selection often occurs in association with mimicry.
In chemistry, ionization often occurs in a liquid solution.
An introduction to summer often occurs in a swimsuit fitting room.
The disease most often occurs in women of childbearing age and is exacerbated by estrogen.
But, as often occurs in our interwoven world, connecting the dots is revealing.
When such fantasy breaks into real life, it often occurs in the context of psychological and physical abuse.
That's light years away from what often occurs in many of our organizations and among our leaders.
Yet as so often occurs in New York, the very peculiarity of the situation creates its own opportunities.
This highly evolved brain area is weakened by stress, as often occurs in adolescence.
