毎月

In a sentence

• 私は毎月新しい本を購入しています。

  I purchase a new book every month.

  In this sentence, 毎月 indicates a recurring event (purchasing a book) that happens on a monthly basis.

• 家賃は毎月の終わりに支払います。

  The rent is paid at the end of every month.

  Here, 毎月 specifies a regular obligation (rent payment) occurring at the end of each monthly cycle.

• 健康のために毎月一回ジムに行っています。

  For health reasons, I go to the gym once a month.

  In this example, 毎月 establishes the periodicity (once) over the span of a month, emphasizing the single recurring action.