Ja'iru was nothing more than an unremarkable demon clan baron, but due to a minor accident, he ended up defeating one of the Grand Dukes second only to the Demon King, and found himself taking over that position. This is the story of Ja'iru's first and second years as he aimed to live as peacefully as possible among the demon clan, whose members were mostly muscle-headed. Surrounded by his selfish sister with a brother complex, the most powerful queen, his womanizing best friend, a somewhat perverted Demon King, a strict butler, an expressionless subordinate, and others, Ja'iru's peaceful daily life continued on as always. From the third year onward, I am writing the sequel as "The Peaceful Daily Life of the Demon Clan Grand Duke" → "The Peaceful Daily Life of the Terror Grand Duke."
| Word | Frequency | Difficulty |
|---|---|---|
| 介する | 1 | 5.34 |
| 仲が良い | 1 | 4.21 |
| すげない | 1 | 5.33 |
| 腐蝕 | 1 | 5.33 |
| してもいい | 1 | 3.90 |
| 気が済む | 1 | 4.67 |
| 絶叫 | 1 | 3.73 |
| 長旅 | 1 | 4.43 |
| 蟹 | 1 | 3.81 |
| 現場 | 1 | 3.55 |
| 命を奪う | 1 | 4.46 |
| ぎりぎり | 1 | 4.03 |
| 空しく | 1 | 4.54 |
| 気立て | 1 | 5.23 |
| ざ | 1 | 4.59 |
| 足を踏み入れる | 1 | 4.14 |
| 差す | 1 | 3.65 |
| de | 1 | 3.93 |
| 代わり | 1 | 3.62 |
| 屠る | 1 | 4.01 |
| 四方 | 1 | 3.91 |
| 王国 | 1 | 2.54 |
| 思いやる | 1 | 4.65 |
| 往復 | 1 | 4.05 |
| 山羊 | 1 | 4.34 |
| 恋敵 | 1 | 4.72 |
| 仮想 | 1 | 4.18 |
| 心配いらない | 1 | 4.76 |
| 吹き込み | 1 | 5.34 |
| 数ある | 1 | 4.72 |
| 契約金 | 1 | 5.45 |
| 染み着く | 1 | 6.01 |
| 私共 | 1 | 4.70 |
| 流通経路 | 1 | 5.69 |
| 見通す | 1 | 4.46 |
| 名を連ねる | 1 | 4.93 |
| 二の腕 | 1 | 4.42 |
| トップ | 1 | 3.60 |
| 役にたつ | 1 | 5.51 |
| 良し | 1 | 3.85 |
| ぽい | 1 | 4.24 |
| タイミング良く | 1 | 4.55 |
| 乏しい | 1 | 4.07 |
| こと無く | 1 | 3.11 |
| すがり付く | 1 | 4.84 |
| 半殺し | 1 | 4.78 |
| ぎすぎす | 1 | 5.87 |
| 着こなし | 1 | 4.75 |
| 臙脂色 | 1 | 5.55 |
| ねちねち | 1 | 5.43 |
| 地塊 | 1 | 5.39 |
| イヤリング | 1 | 4.57 |
| 腐臭 | 1 | 4.75 |
| 採用 | 1 | 3.92 |
| 非日常 | 1 | 4.93 |
| 地位を得る | 1 | 5.69 |
| 遅め | 1 | 4.73 |
| 御前 | 1 | 4.23 |
| 抹額 | 1 | 4.50 |
| 中年 | 1 | 3.85 |
| 意味ない | 1 | 4.50 |
| スポット | 1 | 4.63 |
| 枕 | 1 | 3.99 |
| 勤しむ | 1 | 4.26 |
| 上質 | 1 | 4.33 |
| 島 | 1 | 3.06 |
| 悪びれる | 1 | 4.37 |
| あなた様 | 1 | 4.20 |
| 町を通る | 1 | 6.45 |
| 売女 | 1 | 5.19 |
| 不慣れ | 1 | 4.49 |
| 察知 | 1 | 3.27 |
| こと自体 | 1 | 3.91 |
| 言いがたい | 1 | 4.75 |
| どうだって良い | 1 | 5.00 |
| 荒々しい | 1 | 4.28 |
| 遠ざける | 1 | 4.03 |
| 偶数 | 1 | 5.45 |
| 百戦錬磨 | 1 | 4.88 |
| ワンフロア | 1 | 5.70 |
| 逆立ち | 1 | 4.88 |
| 葵色 | 1 | 6.27 |
| 放り出す | 1 | 3.88 |
| 手段 | 1 | 3.10 |
| 史話 | 1 | 4.29 |
| 二人連れ | 1 | 5.29 |
| 限度 | 1 | 4.11 |
| 次々に | 1 | 3.79 |
| より取り見取り | 1 | 5.32 |
| 猛虎 | 1 | 4.12 |
| 純 | 1 | 4.16 |
| 巻子 | 1 | 4.79 |
| 間一髪 | 1 | 4.50 |
| 問いかけ | 1 | 3.56 |
| バスローブ | 1 | 5.22 |
| 又は | 1 | 3.91 |
| 両手に花 | 1 | 5.16 |
| 薄々 | 1 | 4.22 |
| あやつ | 1 | 4.15 |
| 間合い | 1 | 3.58 |
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