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Grammar Book

GrammarBook N5: ~に~回 (frequency and rates)

  • 18 Jan, 2026
  • Com 0
N5-G-040

~に~回 (Frequency expressions)

Supporting / Numbers

👀 Layer A: Visual Guide (直感理解)

📝 Quick Summary (まとめ)

「1週間に1回」や「1年に2回」など、どのくらいの頻度(ひんど)で何かをするかを説明する表現です。「~につき (Per)」という意味で「に」を使います。
Use this pattern to express frequency or rate (“Once a week”, “Twice a year”). The particle “NI” indicates “per”.

Structure: [Period] に [Number] 回 [Verb]。
([Period] ni [Number] kai [Verb].)

🔗 Connected Grammar (関連文法):

  • N5-G-041: Duration Expressions (1-nichi, 1-shuukan)
  • N5-G-042: Basic Counters (1-kai, 2-kai)

🔍 Layer B: Deepening (深掘り)

💡 Raya’s Hack (攻略法)

「に」は割り算の線(/)!
「3回/週」と書くときの「/(スラッシュ)」が「に」だと思えば簡単!
1日 / 3回 = 1日 に 3回。
このリズムを覚えよう!

Think of “NI” as the slash symbol (/) meaning “Per”. “3 times/week” becomes “1-shuukan NI 3-kai”. It creates the rate!

🚧 Joy’s Mistake (よくある間違い)

Scene: Joy says he watches movies 3 times a month.

Joy: 「1か月 の 3回 映画を見ます。」
(Ikkagetsu NO sankai eiga o mimasu.)

❌ Wrong Particle!

Why?

「の (NO)」は名詞をつなぐだけです。割合(Rate)を表すときは必ず「に (NI)」を使います。
正解は「1か月 に 3回」です。

“NO” just connects nouns. To express a rate or frequency per period, you must use “NI”. Correct: “Ikkagetsu NI sankai”.

🔥 Layer C: Practice Loop

Now it’s time to test your learning through the next 10 practice drills!

Level 1: Calculating the Rate

Q1. Once a week (1-shuukan, 1-kai)
答え: 1週間に 1回 (Isshuukan ni ikkai)

(Period + ni + Count)

Q2. Twice a month (1-kagetsu, 2-kai)
答え: 1か月に 2回 (Ikkagetsu ni nikai)

(Period + ni + Count)

Q3. 3 times a day (1-nichi, 3-kai)
答え: 1日に 3回 (Ichinichi ni sankai)

(Period + ni + Count)

Q4. Once a year (1-nen, 1-kai)
答え: 1年に 1回 (Ichinen ni ikkai)

(Period + ni + Count)

Q5. 4 times a week (1-shuukan, 4-kai)
答え: 1週間に 4回 (Isshuukan ni yonkai)

(Period + ni + Count)

Level 2: Sentences

Q6. I watch a movie once a month. (Eiga, Mimasu)
答え: 1か月に 1回 映画を見ます。

(Ikkagetsu ni ikkai eiga o mimasu.)

Q7. I take medicine 3 times a day. (Kusuri, Nomimasu)
答え: 1日に 3回 薬(くすり)を 飲みます。

(Ichinichi ni sankai kusuri o nomimasu.)

Q8. I travel twice a year. (Ryokou shimasu)
答え: 1年に 2回 旅行します。

(Ichinen ni nikai ryokou shimasu.)

Q9. I study Japanese 5 times a week.
答え: 1週間に 5回 日本語を 勉強します。

(Isshuukan ni gokai Nihongo o benkyou shimasu.)

Q10. Translate: “How many times a month do you go?” (Nan-kai)
答え: 1か月に 何回 行きますか?

(Ikkagetsu ni nankai ikimasu ka?)

Related posts:

GrammarBook N5 : AはBです (A is B) GrammarBook N5: The Particle も (also) GrammarBook N5: い-adjectives GrammarBook N5: ~たいです
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N5
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GrammarBook N5: で (Transportation)
GrammarBook N5: Duration Expressions

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