Do you eat fish regularly? What type?
I do not eat fish quite regularly. I like salmon the most.
These are a couple of perfectly acceptable sentences in English. Well done.
May I suggest the following adjustment to the first sentence:
I do not eat fish often.
Well done K ,you did well with this exercise ;o)
I agree with Krzyzeks reply " I do not eat fish often"
I do not eat fish on a regular basis quite regularly. I like salmon the most.