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 |
|---|---|---|
| 着地点 | 1 | 4.97 |
| 一大事 | 1 | 4.41 |
| ああん | 1 | 4.56 |
| 出不精 | 1 | 5.52 |
| エロ | 1 | 4.02 |
| その調子 | 1 | 4.64 |
| 使用方法 | 1 | 5.01 |
| 取引 | 1 | 3.61 |
| 悟り | 1 | 4.34 |
| 誠意 | 1 | 4.31 |
| 健闘を祈る | 1 | 5.33 |
| 青筋 | 1 | 4.33 |
| 全土 | 1 | 4.19 |
| 腕力 | 1 | 3.98 |
| 十倍 | 1 | 4.40 |
| 待ちに待った | 1 | 4.82 |
| 地塊 | 1 | 5.39 |
| ふうん | 1 | 4.17 |
| 八本 | 1 | 4.63 |
| 正当 | 1 | 4.16 |
| 落 | 1 | 4.45 |
| 信じ難い | 1 | 4.75 |
| 休み | 1 | 3.57 |
| お淑やか | 1 | 4.70 |
| もしもの事 | 1 | 4.86 |
| 厳しさ | 1 | 4.58 |
| 連ねる | 1 | 4.35 |
| ろう | 1 | 4.51 |
| なるべく早く | 1 | 4.49 |
| 甘言 | 1 | 4.96 |
| 俺様 | 1 | 3.78 |
| 頬杖 | 1 | 4.40 |
| 一致団結 | 1 | 4.94 |
| いらした | 1 | 4.31 |
| 言ってはなんですが | 1 | 5.43 |
| 組み合わす | 1 | 5.35 |
| 数種 | 1 | 5.44 |
| 対極 | 1 | 4.74 |
| 剛毅 | 1 | 5.05 |
| 三者 | 1 | 4.75 |
| 羽振り | 1 | 5.33 |
| 大物 | 1 | 3.85 |
| 察知 | 1 | 3.27 |
| 野心家 | 1 | 4.94 |
| 所有 | 1 | 3.86 |
| 図らずも | 1 | 4.78 |
| 遠慮がち | 1 | 4.35 |
| 手順 | 1 | 3.94 |
| 説得力 | 1 | 4.06 |
| 碌な | 1 | 4.28 |
| 痛くも痒くもない | 1 | 5.16 |
| 振り絞る | 1 | 4.02 |
| 制約 | 1 | 4.18 |
| 入城 | 1 | 4.93 |
| 率先 | 1 | 4.16 |
| 手放し | 1 | 4.11 |
| 起こり | 1 | 4.04 |
| 疾風 | 1 | 4.06 |
| 名を連ねる | 1 | 4.93 |
| もう一人 | 1 | 3.48 |
| 悔いる | 1 | 4.83 |
| 運 | 1 | 3.55 |
| 排除 | 1 | 3.51 |
| プレッシャーを掛ける | 1 | 5.61 |
| ペン | 1 | 3.95 |
| 目を見る | 1 | 4.88 |
| 前傾姿勢 | 1 | 4.87 |
| 勃つ | 1 | 4.12 |
| この場合 | 1 | 3.78 |
| 並 | 1 | 3.70 |
| 上出来 | 1 | 4.45 |
| 遙か | 1 | 3.87 |
| 専門用語 | 1 | 5.15 |
| 思いつき | 1 | 4.25 |
| 要求 | 1 | 3.44 |
| 指令 | 1 | 4.31 |
| 表立った | 1 | 5.31 |
| 寛ぎ | 1 | 4.55 |
| 嗜み | 1 | 4.57 |
| 長らえる | 1 | 5.13 |
| 冷やす | 1 | 4.17 |
| 迸る | 1 | 4.15 |
| 歪み | 1 | 3.95 |
| 押す | 1 | 3.40 |
| 計算式 | 1 | 5.14 |
| 進んで | 1 | 3.07 |
| とく | 1 | 3.39 |
| 恋い焦がれる | 1 | 5.23 |
| 痛める | 1 | 4.14 |
| 大正 | 1 | 5.28 |
| 差す | 1 | 3.65 |
| 蔑ろにする | 1 | 4.74 |
| 前倒し | 1 | 4.75 |
| 享ける | 1 | 5.09 |
| 怖いもの知らず | 1 | 5.31 |
| 善処 | 1 | 4.65 |
| 呼称 | 1 | 4.25 |
| 所用 | 1 | 4.93 |
| 絹糸 | 1 | 4.97 |
| 〇 | 1 | 3.31 |
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