Magazine's periodicity - the correct term?

I would like to know what's the correct term for magazines that are published three times a year. For example, I know that the term for the ones published four times a year is "quarterly", and the ones published every month are called "monthly" etc. What about magazines or periodicals published every four months? The word used in portuguese is "quadrimestral", but I cannot find the right translation! Could anyone help me with urgency, please?
Regards,
Sara Grünhagen - Brazil

Good afternoon.

I have seen these described as "serials." You could describe it as "a serial that is published three times a year." Or, you could just describe it as "a periodical published three times a year."

I would be interested to know what others have to say on this!

Regards,
Gloria
Moderator, EssayForum.com

ok, but what's the term used on magazines??? at the editorial or together with the publications' information?

It doesn't matter what type of periodical it is (magazine, journal, etc.); they are still referred to as "serials" or one of the more descriptive choices above. What do you mean by "at the editorial or together with the publications' information?"

Regards,
Gloria
Moderator EssayForum.com