Every Other Month
noun, の adjective
If you isolate this month from next month, and then do that over and over again, you'll be looking at every other month isolated from the other months.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
日本文化の授業が隔月で開講されるんですが、今月は餅つきをする予定です。
We have a Japanese culture class every other month and we plan to pound mochi this month.