Used to indicate doing something for the first time in several months; after a gap of a few months.
何ヶ月ぶりかに映画館へ行って新作を見た。
I went to the cinema for the first time in several months and watched a new film.
今日は何ヶ月ぶりかに友達と会ってランチをした。
Today I met a friend for lunch for the first time in several months.
何ヶ月ぶりかに試験勉強を再開した。
I resumed studying for exams after several months.